Systems and methods for delivering a respiratory gas

ABSTRACT

A respiratory ventilation apparatus configured to deliver a respiratory gas to a patient interface is provided. The apparatus may include a gas pressurization unit configured to generate a pressurized respiratory gas, a gas inlet port configured to introduce the respiratory gas into the respiratory ventilation apparatus, a gas outlet port configured to discharge the pressurized respiratory gas to a respiration tube, a detection module configured to detect the pressure of the pressurized respiratory gas, at least one non-volatile memory configured to store a plurality of parameters and a plurality of programs, and one or more controllers. The one or more controllers may be configured to initiate the respiratory ventilation apparatus upon a boot operation, and/or initiate a program that constantly reads information from the detection module, and controls the pressure of the pressurized respiratory gas using the information read from the detection module and at least one parameter.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.17/073,495, filed on Oct. 19, 2020, which is a continuation of U.S.patent application Ser. No. 16/988,595, filed on Aug. 7, 2020, which isa continuation of International Patent Application No.PCT/CN2018/111996, filed on Oct. 26, 2018, the contents of which arehereby incorporated by reference.

TECHNICAL FIELD

This disclosure generally relates to the detection, diagnosis,treatment, prevention and amelioration of respiratory-related disorders,and more particularly, relates to systems and methods for delivering arespiratory gas.

BACKGROUND

Respiration is significant for the maintenance of the vitality of asubject (e.g., a human body). The respiratory system of the subject canfacilitate gas exchange. The nose and/or mouth of the subject form theentrance to the airways of the subject. A range of respiratory disorders(e.g., apnea, hypopnea, hyperpnea, snore, or the like) exist. Therespiratory disorders can threaten the health (and/or life) of thesubject. Therefore, it is desirable to develop system(s) and method(s)for delivering a respiratory gas for the subject.

SUMMARY

In one embodiment, a humidification assembly is configured to humidifythe pressurized respiratory gas from a respiratory ventilationapparatus, wherein the humidification assembly including a liquidchamber configured to accommodate one or more liquids, wherein theliquid chamber including a tank, a tank cover, and a humidificationassembly gas inlet port configured to introduce the pressurizedrespiratory gas, via a first gas passage, into the tank, wherein thefirst gas passage includes an output port.

In one embodiment, the liquid chamber of the humidification assemblyfurther includes: a humidification assembly gas outlet port configuredto introduce the humidified and pressurized respiratory gas, via asecond gas passage back into a main body of the respiratory ventilationapparatus, wherein the second gas passage includes an input port.

In one embodiment, the liquid chamber of the humidification assemblycomprises a shell, wherein the humidification assembly gas inlet port ofthe liquid chamber and/or the humidification assembly gas outlet port ofthe liquid chamber are set on a first side surface of the shell of theliquid chamber, and wherein the output port of the first gas passage forconnecting the first gas passage with the tank and/or the input port ofthe second gas passage for connecting the second gas passage with thetank are set inside the shell of the liquid chamber. In one embodimentthe shell comprises an inner shell and a cover shell in a layeredstructure. Such layered structure may allow the shell to be dissembledand cleaned easily.

By forming the first and second gas passages in the shell of the liquidchamber, the tank may comprise a simple design with a much wider openingand volume allowing it to be more easily maintained and filled, e.g.,comparing filling the water through one of the gas passages.

In one embodiment, the output port of the first gas passage faces asecond side surface of the shell of the liquid chamber, the input portof the second gas passage faces a third side surface of the shell of theliquid chamber, and the second side surface of the shell of the liquidchamber is opposite to the third surface of the shell of the liquidchamber.

By spacing the input and output ports apart, gas flow may travel alonger distance while being exposed to the liquid(s) in the tank, thus,increasing the efficiency of the humidification.

In one embodiment, the liquid chamber includes a guide plate set on anupper edge of the output port of the first gas passage, the guide platebeing configured to guide the pressurized respiratory gas to flowdownward to the tank.

In one embodiment, the first gas passage includes a first portion and asecond portion, wherein the first portion of the first gas passageextends from the humidification assembly gas inlet port of the liquidchamber to a first common plane, wherein the second portion of the firstgas passage extends from the first common plane to the output port ofthe first gas passage. Such shape of the gas passage reduces the noisewithin the liquid chamber exiting through the gas passage.

In addition thereto or alternatively, the second gas passage includes afirst portion and a second portion according to one embodiment, whereinthe first portion of the second gas passage extends from the input portof the second gas passage to a second common plane, wherein the secondportion of the second gas passage extends from the second common planeto the humidification assembly gas outlet port of the liquid chamber.

By forming the first and second gas passage with a common plane, acompact design may be achieved.

Additionally, or alternatively, the first and second gas passages has asubstantially rectangular cross-section. Such rectangular cross-sectionmay save dead space comparing to tubular cross-section and/or increasingthe area of the cross-section, thus allowing a more compact designand/or a lower resistance for the pressurized gas.

In one embodiment, the first gas passage and the second gas passagecross each other; wherein the distance between the output port and thehumidification assembly gas inlet port is larger than the distancebetween the output port and the humidification assembly gas outlet port.

Additionally, or alternatively, the distance between the input port andthe humidification assembly gas outlet port is larger than the distancebetween the input port and the humidification assembly gas inlet port.

By crossing the first and second gas passage, mechanical noise from amain body of a respiratory ventilation apparatus for connected to thehumidification assembly gas inlet port of the first gas passage andbubbling noise in the tank and propagating through the second gaspassages are reduced with a compact design reducing the dead space.Liquid in the tank is also less likely reaching the inlet and outletports.

In one embodiment, the first portion of the first gas passage issubstantially parallel to the second portion of the second gas passagealong a direction having an angle with the first side surface of theshell of the liquid chamber. Additionally, or alternatively, the secondportion of the first gas passage and the first portion of the second gaspassage are set in different layers according to one embodiment.Additionally, or alternatively, a first projection of the second portionof the first gas passage on a horizontal plane and a second projectionof the first portion of the second gas passage on the horizontal planeare intersecting or at least partially overlapping according to oneembodiment.

In one embodiment, the second portion of the first gas passage is setbelow the first portion of the second gas passage, or the first portionof the second gas passage is set below the second portion of the firstgas passage.

In one embodiment, an area of a first cross section of the first gaspassage on the first common plane is equal to or less than half of anarea of the humidification assembly gas inlet port of the liquidchamber, and/or an area of a second cross section of the second gaspassage on the second common plane is equal to or less than half of anarea of the humidification assembly gas outlet port of the liquidchamber.

In one embodiment, the liquid chamber further includes: a first inclinedplate set between the first cross section and the humidificationassembly gas inlet port of the liquid chamber, the first inclined platebeing configured to smooth flowing of the pressurized respiratory gas inthe first gas passage, and a second inclined plate set between thesecond cross section and the humidification assembly gas outlet port ofthe liquid chamber, the second inclined plate being configured to smoothflowing of the humidified and pressurized respiratory gas in the secondgas passage.

In one embodiment, the liquid chamber further includes a connectingplate, the connecting plate including a first aperture and a secondaperture, the first aperture and the second aperture corresponding tothe humidification assembly gas inlet port and the humidificationassembly gas outlet port of the liquid chamber respectively, theconnecting plate being configured to allow a sealed connection betweenthe liquid chamber and the main body of the respiratory ventilationapparatus.

In one embodiment, the liquid chamber further includes: a first grooveset between the humidification assembly gas inlet port of the liquidchamber and the connecting plate, the first groove being configured toaccommodate a first portion of the one or more liquids and prevent thefirst portion of the one or more liquids from entering the main body ofthe respiratory ventilation apparatus when the liquid chamber is tilted,and/or a second groove set between the humidification assembly gasoutlet port of the liquid chamber and the connecting plate, the secondgroove being configured to accommodate a second portion of the one ormore liquids and prevent the second portion of the one or more liquidsfrom entering the main body of the respiratory ventilation apparatuswhen the liquid chamber is tilted.

In one embodiment, at least a portion of a bottom of the first gaspassage is below a lower edge of the humidification assembly gas inletport of the liquid chamber, and/or at least a portion of a bottom of thesecond gas passage is below a lower edge of the humidification assemblygas outlet port of the liquid chamber.

The arrangement may prevent fluid, e.g. condensed water, exit from thegas passages through the gas outlet port and/or enter the gas outletport, when the tank cover is closed, or reduce such risks.

In one embodiment the shell is connected and/or connectable to the tankand/or to the tank cover and arranged pivotally relative to the tank. Asthe first and/or second gas passages are formed with the shell, thestructure of the tank can be formed in a very simple manner allowingbetter access for cleaning and liquid filling.

In one embodiment, a liquid contacting side wall of the liquid chamberis at least partially formed by an outer side wall of the tank formingthe outer surface of the humidification assembly. Additionally oralternatively, the tank is formed with only one opening for fillingliquid and for exchange of pressurized gas. Comparing to some knowndesigns, the liquid chamber and/or the tank may be formed in a simplermanner, e.g., with single layer side wall, and/or e.g., with an upperside substantially open thus reducing the weight and the size,increasing the liquid-gas contacting surface and making access to thetank/liquid chamber easier.

In one embodiment, the tank cover is pivotally connected to the tankthrough a connection mechanism; wherein at least a portion of the sideof the first gas passage near the connection mechanism is covered in theflow direction by a side edge of the humidification assembly gas inletport of the liquid chamber, and/or wherein at least a portion of theside of the second gas passage near the connection mechanism is coveredin the flow direction by a side edge of the humidification assembly gasoutlet port of the liquid chamber.

Once the tank cover is opened by pivoting the tank cover around arotational axis defined by the connection mechanism, the side of thefirst and/or second gas passages near the connection mechanism will beturned into a lower position than other sides of the first and/or secondgas passages. By covering at least a portion of such side, liquid withinthe first and/or second gas passages is prevented from flowing ordripping out damaging e.g. electronic components or dropping on e.g. thesurface on which the humidification assembly is placed.

In one embodiment, the tank cover is pivotally connected to the tankthrough a connection mechanism, and wherein the distance between theconnection mechanism and the humidification assembly gas outlet port isless than the distance between the connection mechanism and thehumidification assembly gas inlet port.

Due to connection mechanism and the leverage effect, the port near theconnection mechanism, e.g. a pivotable hinge connection, may have atighter seal and/or less gap error than the port far away from theconnection mechanism. By arranging the humidification assembly gasoutlet port near the connection mechanism, the sealing of the humidifiedgas flowing through the humidification assembly gas outlet port inimproved, which may be more critical than the sealing of the not yethumidified gas entering the humidification assembly through thehumidification assembly gas inlet port in some circumstances.

In one embodiment, a respiratory ventilation apparatus is configured todeliver a respiratory gas to a patient interface, comprising anabove-mentioned humidification assembly and further comprises: a gaspressurization unit configured to generate the pressurized respiratorygas by pressurizing the respiratory gas, the gas pressurization unitbeing located in a main body of the respiratory ventilation apparatus,the main body of the respiratory ventilation apparatus including ahousing with a first side wall configured to discharge the pressurizedrespiratory gas; a main gas inlet port configured to introduce therespiratory gas into the respiratory ventilation apparatus, the main gasinlet port being set on a second side wall of the housing of the mainbody of the respiratory ventilation apparatus; and

-   a main gas outlet port configured to discharge the humidified and    pressurized respiratory gas to a respiration tube.

In one embodiment, the main gas outlet port is for setting on the mainbody of a respiratory ventilation apparatus.

In one embodiment, the main gas outlet port is set on the liquidchamber.

In one embodiment, the first side surface of the shell of the liquidchamber faces the first side wall of the housing of the main body of therespiratory ventilation apparatus.

In one embodiment, a respiratory ventilation apparatus is configured todeliver a respiratory gas to a patient interface, comprising: a gaspressurization unit located in a main body of the respiratoryventilation apparatus; a humidification assembly being removably coupledto the main body of the respiratory ventilation apparatus; wherein thehumidification assembly includes: a liquid chamber configured toaccommodate one or more liquids.

In one embodiment, the liquid chamber comprises a tank and a tank cover,which is pivotally connected to the tank through a connection mechanismwith a rotational axis; wherein the tank comprises an opening forfilling at least one of the one or more liquids, wherein the opening isopenable by opening the tank cover and/or closable by closing the tankcover; and wherein the humidification assembly and the main body of therespiratory ventilation apparatus are fluidically connectable by closingthe tank cover and/or fluidically disconnectable by opening the tankcover.

By allowing the main body and the humidification assembly be fluidicallyconnected to form the flow channel for the pressurized gas and/orhumidified and pressurized gas using the pivotable tank cover, themechanical connection between the main body and the tank (often filledwith water) may be isolated from the fluidically sealing, making themechanical connection between the main body and the tank to be more easyto operate while the fluidically connection is secured to be gas-tightunder pressure. Further, a lever effect of the tank cover can be used toensure that the fluid connection is tight against the pressurized gas atone hand, easy to operate with less force on the other hand. In someembodiments, the liquid chamber may be directly mounted on the main bodyof the respiratory ventilation apparatus, the liquid chamber and themain body of the respiratory ventilation apparatus may be fluidicallyconnectable through at least a connecting port for forming at least oneflow channel between the main body of the respiratory ventilationapparatus and the liquid chamber, and the liquid chamber may include thetank cover that can be opened. In order to fill liquid(s) in the liquidchamber, the user only needs to open the tank cover and fill theliquid(s) in the tank. When filling the liquid(s), the fluid connectionbetween the liquid chamber and the main body may be disconnected.Therefore, the respiratory ventilation apparatus has simplifiedstructure and is easy to use. In some embodiments, the main body of therespiratory ventilation apparatus may include a blower of the gaspressurization unit, and/or a heating component configured to heat theliquid(s) in the liquid chamber. The heating component may be mounted ona side surface of the main body. The heating component and the main bodymay be configured as an integral piece, or the heating component may bedetachable from the main body. In some embodiments, the tank and thetank cover may be locked when the tank cover is closed. In someembodiments, the liquid chamber and the heating component may be locked.In some embodiments, the tank cover may not be locked to the main body,and the tank cover is fixed to the main body via the locking between thetank and the tank cover, and the locking between the tank and the mainbody. When the liquid chamber is mounted with the heating component, thetank cover may be opened by unlocking the tank cover from the tank.Therefore, the opening and closing of the tank cover, and the fluidconnection and disconnection between the tank cover and the main bodymay be facilitated. It should be noted that any other locking modebetween the tank and the tank cover may realize the functionsillustrated above without unlocking the liquid chamber from the mainbody.

In some embodiments, the tank and the main body are attachable with eachother by moving the tank in an attaching direction relative to the mainbody with an angle between the rotational axis and the attachingdirection between 20°-160°, or in some embodiments between 45°-135°, orin some further embodiments, between 60°-120°; and/or wherein the tankand the main body are unlockable from each other by moving the tank inan unlocking direction relative to the main body with an angle betweenthe rotational axis and the unlocking direction between 20°-160°, or insome embodiments between 45°-135°, or in some further embodiments,between 60°-120°.

By arranging the rotational axis relative to the attaching direction insaid manners, closing the tank cover may be in a direction perpendicularto the rotational axis and may have a component in the attachingdirection. Thus, closing the tank cover towards the tank may also resultin attaching the tank with the main body. The user comfort is thusimproved.

In some embodiments, the angle between attaching direction and theunlocking direction is between −45° and 45°, in some furtherembodiments, between −30° and 30°, and in some further embodiments,between −15° and 15°. In one embodiment, the attaching direction and theunlocking direction may be substantially in the same direction. This canbe further combined with a rotational axis allowing the tank cover onlyto be opened in a substantially opposite direction than the unlockingdirection to avoid the user unlock the tank accidentally by opening thetank cover. The user comfort is increased.

In some embodiments, the humidification assembly and the main body ofthe respiratory ventilation apparatus are fluidically connectablethrough at least a connecting port for forming at least one flow channelbetween the main body of the respiratory ventilation apparatus and theliquid chamber; wherein the at least one connecting port comprises a gasinlet port and a gas outlet port; wherein the connecting port comprisesan axial sealing member for fluidically sealingly connecting the gasinlet port and the gas outlet port; wherein an inner surface of theaxial sealing member forms at least partially the flow channel andwherein the axial sealing member defines a sealing plane.

By using an axial sealing member, the sealing member creates, e.g.,comparing to a cone-shaped connector forming a radial sealing, lessfrictional forces during connection and disconnection, thus improvingthe user comfort and operational safety.

In some embodiments, the angle between the sealing plane and the liquidlevel in the liquid chamber is between −75°-75°, in some furtherembodiments, between −30° and 30°, and in some further embodiments,between 15° and 65°; and/or wherein the angle between the sealing planeand the attaching direction is between 15°-165°, in some furtherembodiments, between 30° and 150°, and in some further embodiments,between 45° and 135°, and in some further embodiments, between 70° and110°; and/or wherein the angle between the liquid level and theunlocking direction is between 15°-165°, in some further embodiments,between 30° and 150°, and in some further embodiments, between 45° and135°, and in some further embodiments, between 70° and 110°.

By arranging the sealing plane in the said manners relative to theliquid level (e.g., the horizontal plane), and/or, by arranging theattaching direction in the said manners relative to the liquid level,the risks of the liquid being spilled out during the sealing, unlockingand/or attaching is reduced. The liquid level is the designed level ofthe liquid during normal use of the respiratory ventilation apparatusand the humidification assembly.

In some embodiments, the inner surface of the axial sealing member formsat least partially the flow channel and/or the overlapping section ofthe gas inlet and outlet port in a sealed state is less than 5 mm, suchthat the gas inlet port is disconnectable from the gas outlet portwithout the gas inlet port contacting the gas outlet port; wherein theaxial sealing member comprises one or more elastical materials with ashore hardness of less than 70 (e.g., 20-70, 60, or the like), accordingto ASTM D2240 Typ A and wherein the axial sealing member is compressedalong the axial direction by 10%-50% and/or by 0.5-6 mm (e.g., 1-3 mm)in a sealed state comparing to a state, wherein the main body and thehumidification assembly are unlocked.

In some embodiments, the gas inlet port comprises an inlet aperture andthe gas outlet port comprises an outlet aperture, wherein the inlet andoutlet apertures are formed by one or more materials having a higherhardness than an elastical material forming the axial sealing member.

In some embodiments, the axial sealing member is formed around the inletaperture and/or around the outlet aperture.

In some embodiments, the inlet aperture and the outlet aperture areformed by materials having a higher hardness than the elastic materialforming the axial sealing member, and the inlet aperture and the outletaperture are spaced apart by the axial sealing member in the axialdirection of axial sealing member. In some embodiments, the inletaperture and the outlet aperture are spaced apart at least 1 mm, in somefurther embodiments, at least 5 mm by the axial sealing member in theaxial direction thereof in a sealed and attached state of thehumidification assembly. By spacing the inlet and the outlet aperturesapart in the axial direction, not only friction force between the gasinlet and outlet ports is minimized, collision between the materialsforming the inlet and outlet apertures having a higher hardness is alsominimized, reducing the sudden noise during the assembly and/ordisassembly of the respiratory ventilation apparatus. Shortly before theinlet and outlet apertures are connected, the relative movement betweenthe humidification assembly and the main body of the respiratoryventilation apparatus is also buffered by the axial sealing member,which further increases the user comfort.

In some embodiments, the axial sealing member comprises multiple partsconsisting of the one or more elastic material and are configured suchthat a dynamic frictional force exists only between such parts duringcoupling or de-coupling of the humidification assembly.

In some embodiments, the axial sealing member comprises a sealing lipprotruding from at least one of the inlet and the outlet apertures,wherein the sealing lip is inclined toward the center of the flowchannel and is configured to bend towards the center of the flow channelif pressed and/or compressed by connecting the gas inlet port with thegas outlet port.

In some embodiments, the liquid chamber is in detachable connection withthe main body of the respiratory ventilation apparatus through apush-push mechanism.

In some embodiments, a push direction of the push-push mechanism issubstantially perpendicular to the rotational axis of the connectionmechanism, wherein the humidification assembly and the main body of therespiratory ventilation apparatus are fluidically connectable by closingthe tank cover in the push direction of the push-push mechanism whilethe tank is attached to the main body, and by attaching the liquidchamber to the main body in the push direction while the tank cover isclosed.

In some embodiments, the gas pressurization unit is configured togenerate a pressurized respiratory gas by pressurizing the respiratorygas; the main body of the respiratory ventilation apparatus includes ahousing provided with a first side wall configured to discharge thepressurized respiratory gas; the humidification assembly is configuredto humidify the pressurized respiratory gas; the respiratory ventilationapparatus further comprising: a first gas inlet port configured tointroduce the respiratory gas into the respiratory ventilationapparatus, the first gas inlet port being set on a second side wall ofthe housing of the main body of the respiratory ventilation apparatus;and a first gas outlet port configured to discharge the humidified andpressurized respiratory gas to a respiration tube; wherein the liquidchamber being openable from a front surface of the respiratoryventilation apparatus; wherein the humidification assembly furtherincludes a heater plate configured to heat the one or more liquids andgenerate vapor to humidify the pressurized respiratory gas.

In some embodiments, the liquid chamber is in detachable connection withthe main body of the respiratory ventilation apparatus.

In some embodiments, the liquid chamber comprises: a tank; and a tankcover pivotally connected to the tank through a connection mechanism.

In some embodiments, the tank cover includes a second gas inlet port,the second gas inlet port being configured to introduce the pressurizedrespiratory gas from the main body of the respiratory ventilationapparatus into the liquid chamber.

In some embodiments, the first gas outlet port is set on the liquidchamber.

In some embodiments, the respiratory ventilation apparatus furthercomprises: a connecting piece configured to provide a sealed connectionbetween the tank cover and the main body of the respiratory ventilationapparatus, the connecting piece including a declining surface facing thetank cover, the tank cover includes a corresponding declining surfacefacing the connecting piece, and the declining surface of the tank coverincludes the second gas inlet port.

In some embodiments, the connecting piece includes a gasket, the gasketincludes a first aperture, the first aperture corresponds to the secondgas inlet port of the tank cover, so that when the tank cover is closed,the tank cover is in sealed connection with the main body of therespiratory ventilation apparatus through the gasket, the first apertureand the gas inlet port of the tank cover are capable of introducing thepressurized respiratory gas from the main body of the respiratoryventilation apparatus into the liquid chamber.

In some embodiments, the respiratory ventilation apparatus furthercomprises: a connecting piece configured to provide a sealed connectionbetween the tank cover and the main body of the respiratory ventilationapparatus, the connecting piece including a first thread hose, the firstthread hose corresponding to the second gas inlet port of the tankcover.

In some embodiments, the tank cover includes a second gas inlet port anda second gas outlet port, the second gas inlet port being configured tointroduce the pressurized respiratory gas from the main body of therespiratory ventilation apparatus into the liquid chamber, the secondgas outlet port being configured to discharge the humidified andpressurized respiratory gas from the liquid chamber back into the mainbody of the respiratory ventilation apparatus.

In some embodiments, the respiratory ventilation apparatus furthercomprises: a connecting piece configured to provide a sealed connectionbetween the tank cover and the main body of the respiratory ventilationapparatus.

In some embodiments, the connecting piece includes a declining surfacefacing the tank cover, the tank cover includes a corresponding decliningsurface facing the connecting piece, and the declining surface of thetank cover includes the second gas inlet port and the second gas outletport.

In some embodiments, an angle between the declining surface of theconnecting piece and a horizontal plane is substantially within 45°-60°.

In some embodiments, wherein the connecting piece includes a gasket, thegasket includes a first aperture and a second aperture, the firstaperture corresponds to the second gas inlet port of the tank cover, thesecond aperture corresponds to the second gas outlet port of the tankcover, so that when the tank cover is closed, the tank cover is insealed connection with the main body of the respiratory ventilationapparatus through the gasket, the first aperture and the second gasinlet port of the tank cover are capable of introducing the pressurizedrespiratory gas from the main body of the respiratory ventilationapparatus into the liquid chamber, and the second aperture and thesecond gas outlet port of the tank cover are capable of introducing thehumidified and pressurized respiratory gas from the liquid chamber backinto the main body of the respiratory ventilation apparatus.

In some embodiments, the connecting piece includes a first thread hoseand a second thread hose, the first thread hose corresponds to thesecond gas inlet port of the tank cover, the second thread hosecorresponds to the second gas outlet port of the tank cover.

In some embodiments, the first thread hose and the second thread hoseare substantially vertical, and the second gas inlet port and the secondgas outlet port of the tank cover are set in a horizontal surface facingthe first thread hose and the second thread hose, so that when the tankcover is closed, the tank cover is in sealed connection with the mainbody of the respiratory ventilation apparatus through the first threadhose and the second thread hose, the first thread hose and the secondgas inlet port of the tank cover are capable of introducing thepressurized respiratory gas from the main body of the respiratoryventilation apparatus into the liquid chamber, and the second threadhose and the second gas outlet port of the tank cover are capable ofintroducing the humidified and pressurized respiratory gas from theliquid chamber back into the main body of the respiratory ventilationapparatus.

In some embodiments, the tank cover includes a handle and a buckle on aback of the handle, the tank includes a notch in a position relative tothe handle of the tank cover, and the tank cover is fastened with thetank through the cooperation of the buckle and the notch when the tankcover is closed.

In some embodiments, the handle is set on a front surface of therespiratory ventilation apparatus, and the connection mechanism betweenthe tank and the tank cover is set on a back surface of the respiratoryventilation apparatus, so that when the tank cover is opened, anundersurface of the tank cover is substantially upright and facing thefront surface of the respiratory ventilation apparatus.

In some embodiments, the connection mechanism between the tank and thetank cover comprises:

-   one or more first connecting pieces set on the tank; and-   one or more second connecting pieces set on the tank cover, the one    or more second connecting pieces being in pivot connection with the    one or more first connecting pieces.

In some embodiments, each of the one or more first connecting piecesincludes a pin hole, and each of the one or more second connectingpieces includes a pin.

In some embodiments, wherein each of the one or more second connectingpieces includes a pin hole, and each of the one or more first connectingpieces includes a pin.

In some embodiments, each of the one or more first connecting piecesincludes a first inclined guide surface, each of the one or more secondconnecting pieces includes a second inclined guide surface, and thefirst inclined guide surface and the second inclined guide surface areconfigured to facilitate installation of the tank cover on the tank.

In some embodiments, at least one of the one or more first connectingpieces includes a protruding column, at least one of the one or moresecond connecting pieces includes a groove, and the groove is configuredto accommodate the protruding column and limit a back rotary movement ofthe tank cover when the tank cover is opened to a certain angle.

In some embodiments, the at least one of the one or more secondconnecting pieces further includes a guide slot, the guide slot beingset along a portion of a moving path of the protruding column, the guideslot being configured to smooth a movement of the protruding column.

In some embodiments, the guide slot includes a first end adjacent to thegroove and a second end away from the groove, and the depth of the guideslot is gradually changed from a relatively small value at the first endto a relatively large value at the second end.

In some embodiments, the one or more second connecting pieces include abaffle configured to limit a maximum rotary movement of the tank coverwhen the tank cover is opened.

In some embodiments, a respiratory ventilation apparatus configured todeliver a respiratory gas to a patient interface, may include: a gaspressurization unit configured to generate a pressurized respiratory gasby pressurizing the respiratory gas, the gas pressurization unit beinglocated in a main body of the respiratory ventilation apparatus, themain body of the respiratory ventilation apparatus including a housingwith a first side wall configured to discharge the pressurizedrespiratory gas; a gas inlet port configured to introduce therespiratory gas into the respiratory ventilation apparatus, the gasinlet port being set on a second side wall of the housing of the mainbody of the respiratory ventilation apparatus; a gas filter componentconfigured to filter the respiratory gas introduced into the respiratoryventilation apparatus and/or the pressurized respiratory gas dischargedfrom the gas pressurization unit; and a gas outlet port configured todischarge the pressurized respiratory gas to a respiration tube.

In some embodiments, the gas filter component may include: a housing indetachable connection with the gas inlet port of the respiratoryventilation apparatus; and one or more gas filter units mounted in thehousing, the one or more gas filter units being configured to filter therespiratory gas entering the respiratory ventilation apparatus.

In some embodiments, the one or more gas filter units may include afirst gas filter unit, the first gas filter unit being a coarse filter.

In some embodiments, the one or more gas filter units may include asecond gas filter unit, the second gas filter unit being a fine filter.

In some embodiments, the housing may include a gas inlet end and a gasoutlet end, the gas inlet end including a first cover plate having atleast one hole, the gas outlet end including a second cover plate havingat least one hole.

In some embodiments, the one or more gas filter units may include acoarse filter and a fine filter, and the coarse filter may be positionedcloser to the gas inlet end of the housing than the fine filter.

In some embodiments, the gas inlet end may have a larger intake areathan the gas outlet end.

In some embodiments, the gas filter component may further include abaffle, the baffle having an area less than the gas inlet end of thehousing, the baffle being mounted in the housing, the baffle beingpositioned closer to the gas inlet end of the housing than the one ormore gas units.

In some embodiments, the gas outlet end of the housing may be in asealed connection with the gas inlet port of the respiratory ventilationapparatus via a silicone gasket.

In some embodiments, the gas filter component may include a third gasfilter unit mounted inside the gas inlet port of the respiratoryventilation apparatus, the third gas filter unit being configured tofilter the respiratory gas entering the respiratory ventilationapparatus.

In some embodiments, the third gas filter unit may include a coarsefilter and/or a fine filter.

In some embodiments, the gas filter component may include a fourth gasfilter unit configured to filter one or more gases with pungent smell inone or more gas passages of the respiratory ventilation apparatus, thefourth gas filter unit including a membrane manufactured by one or morenanomaterials having adsorption ability.

In some embodiments, the one or more nanomaterials may include at leastone of activated carbon or graphene.

In some embodiments, the fourth gas filter unit may be mounted outsidethe gas inlet port of the respiratory ventilation apparatus, at the gasinlet port of the respiratory ventilation apparatus, inside the gasinlet port of the respiratory ventilation apparatus, between the gasinlet port of the respiratory ventilation apparatus and a gas inlet portof the gas pressurization unit, at the gas inlet port of the gaspressurization unit, at a gas outlet port of the gas pressurizationunit, between the gas outlet port of the gas pressurization unit and thegas outlet port of the respiratory ventilation apparatus, and/or at thegas outlet port of the respiratory ventilation apparatus.

In some embodiments, the gas filter component may include a fifth gasfilter unit configured to filter bacteria in one or more gases in one ormore gas passages of the respiratory ventilation apparatus.

In some embodiments, the fifth gas filter unit may be mounted outsidethe gas inlet port of the respiratory ventilation apparatus, at the gasinlet port of the respiratory ventilation apparatus, inside the gasinlet port of the respiratory ventilation apparatus, between the gasinlet port of the respiratory ventilation apparatus and a gas inlet portof the gas pressurization unit, at the gas inlet port of the gaspressurization unit, at a gas outlet port of the gas pressurizationunit, between the gas outlet port of the gas pressurization unit and thegas outlet port of the respiratory ventilation apparatus, and/or at thegas outlet port of the respiratory ventilation apparatus.

In some embodiments, the respiratory ventilation apparatus may furtherinclude a humidification assembly configured to humidify the pressurizedrespiratory gas discharged from the gas pressurization unit, and thefifth gas filter unit may be mounted in a gas passage between thehumidification assembly and the gas outlet port of the respiratoryventilation apparatus.

In some embodiments, the respiratory ventilation apparatus may furtherinclude: a respiration mask; and a respiration tube configured tointroduce the pressurized respiratory gas from the gas outlet port ofthe respiratory ventilation apparatus to the respiration mask.

In some embodiments, the gas filter component may include one or moregas filter units, and at least one of the one or more gas filter unitsmay be mounted in the respiration tube or the respiration mask.

In some embodiments, the respiratory ventilation apparatus may furtherinclude a humidification assembly configured to humidify the pressurizedrespiratory gas discharged from the gas pressurization unit.

In some embodiments, a respiratory ventilation apparatus configured todeliver a respiratory gas to a patient interface may include: a gaspressurization unit configured to generate a pressurized respiratory gasby pressurizing the respiratory gas, the gas pressurization unit beinglocated in a main body of the respiratory ventilation apparatus; and aconnecting piece configured to fix the gas pressurization unit to aninternal space of the main body of the respiratory ventilation apparatusand/or damp vibration of the gas pressurization unit.

In some embodiments, the main body of the respiratory ventilationapparatus may include a housing with a first side wall configured todischarge the pressurized respiratory gas. The respiratory ventilationapparatus may further include: a gas inlet port configured to introducethe respiratory gas into the respiratory ventilation apparatus, the gasinlet port being set on a second side wall of the housing of the mainbody of the respiratory ventilation apparatus; and a gas outlet portconfigured to discharge the humidified and pressurized respiratory gasto a respiration tube.

In some embodiments, the connecting piece may include: a connecting partconfigured to connect an outlet port of the gas pressurization unit andform a sealed connection between the connecting piece and the gaspressurization unit; and a fixing part configured to fix the connectingpiece to the internal space of the main body of the respiratoryventilation apparatus and form a fastening connection between theconnecting piece and the main body of the respiratory ventilationapparatus.

In some embodiments, the fixing part may have a sheet structure and mayinclude an aperture configured to allow the pressurized respiratory gasto pass.

In some embodiments, the connecting part may have a tubular structure; afirst end of the connecting part may be fixed to the fixing part; asecond end of the connecting part may be connected to the outlet port ofthe gas pressurization unit; and the connecting part may be capable ofallowing the pressurized respiratory gas to pass through the tubularstructure to the aperture of the fixing part.

In some embodiments, the second end of the connecting part may be anannular double-layer port including an inner layer and an outer layer.

In some embodiments, the inner layer may be connected to an outersurface of the outlet port of the gas pressurization unit.

In some embodiments, the outer surface of the outlet port of the gaspressurization unit may include one or more protruding bumps, and aninner surface of the inner layer may include one or more correspondinggrooves to match with the one or more protruding bumps; or the outersurface of the outlet port of the gas pressurization unit may includeone or more grooves, and the inner surface of the inner layer mayinclude one or more corresponding protruding bumps to match with the oneor more grooves.

In some embodiments, the outer layer may include a first annularflexible structure configured to damp vibration of the gaspressurization unit along an axial direction of the connecting part.

In some embodiments, the first annular flexible structure may have atleast one of a U shape, a V shape, a Z shape, an M shape, an S shape, aC shape, an O shape, or one or more folds.

In some embodiments, the outer layer may be connected to an innersurface of the outlet port of the gas pressurization unit.

In some embodiments, the inner surface of the outlet port of the gaspressurization unit may include one or more protruding bumps, and anouter surface of the outer layer may include one or more correspondinggrooves to match with the one or more protruding bumps; or the innersurface of the outlet port of the gas pressurization unit may includeone or more grooves, and the outer surface of the outer layer mayinclude one or more corresponding protruding bumps to match with the oneor more grooves.

In some embodiments, the inner layer may include a first annularflexible structure configured to damp vibration of the gaspressurization unit along an axial direction of the connecting part.

In some embodiments, the first annular flexible structure may have atleast one of a U shape, a V shape, a Z shape, an M shape, an S shape, aC shape, an O shape, or one or more folds.

In some embodiments, a joint of the inner layer and the outer layer mayinclude a second annular flexible structure configured to damp vibrationof the gas pressurization unit along a radial direction of theconnecting part.

In some embodiments, the second annular flexible structure may have atleast one of a U shape, a V shape, a Z shape, an M shape, an S shape, aC shape, an O shape, or one or more folds.

In some embodiments, the fixing part and the connecting part may beintegral.

In some embodiments, two opposite sides of the fixing part may be stuckinto two slots of the main body of the respiratory ventilationapparatus.

In some embodiments, the fixing part or the connecting part may includea flexible material.

In some embodiments, the flexible material may include at least one ofan elastic material or a wear-resistant material.

In some embodiments, the gas outlet port may be set on the main body ofthe respiratory ventilation apparatus.

In some embodiments, the gas outlet port may be set on the liquidchamber.

In some embodiments, the respiratory ventilation apparatus may includeone or more gas filter units mounted on the housing; wherein the one ormore gas filter units may extend vertically from the lower edge of thegas pressurization unit to the upper edge of the gas pressurizationunit, and/or wherein the one or more gas filter units may extendhorizontally from one side of the gas pressurization unit to theopposite side of the gas pressurization unit.

In some embodiments, a respiratory ventilation apparatus configured todeliver a respiratory gas to a patient interface may include: a gaspressurization unit configured to generate a pressurized respiratory gasby pressurizing the respiratory gas, the gas pressurization unit beinglocated in a main body of the respiratory ventilation apparatus; a maingas outlet port configured to discharge a humidified and pressurizedrespiratory gas to a respiration tube.

In some embodiments, the main body of the respiratory ventilationapparatus may include a housing with a first side wall configured todischarge the pressurized respiratory gas; the respiratory ventilationapparatus may further include: a main gas inlet port configured tointroduce the respiratory gas into the respiratory ventilationapparatus, the main gas inlet port being set on a second side wall ofthe housing of the main body of the respiratory ventilation apparatus;and a gas parameter detection assembly configured to detect one or moregas parameters of the respiratory ventilation apparatus.

In some embodiments, the gas parameter detection assembly may include:an acquisition part configured to acquire a gas flow; a first sensorconfigured to measure a pressure of the gas flow; and a first tubeconfigured to introduce the gas flow from the acquisition part to asurface of the first sensor.

In some embodiments, the first sensor may be a pressure sensor.

In some embodiments, the first sensor may be integrated into a printedcircuit board (PCB) mounted in an inner space of the respiratoryventilation apparatus.

In some embodiments, the acquisition part may face the main gas outletport of the respiratory ventilation apparatus.

In some embodiments, the acquisition part may include: an input port setat a first surface of the acquisition part, the first surface facing themain gas outlet port of the respiratory ventilation apparatus; an outputport set at a second surface of the acquisition part, the second surfacebeing different from the first surface; and a curved channel set insidethe acquisition part, the curved channel being configured to connect theinput port and the output port; wherein the second surface of theacquisition part may be in a sealed connection with an inner surface ofthe main body of the respiratory ventilation apparatus; and the inputport may be set above the second surface of the acquisition part, or theacquisition part is protruding from the inner surface of the main bodyof the respiratory ventilation apparatus, to prevent water from flowingin the acquisition part.

In some embodiments, the input port may be set below a top of the curvedchannel, so as to prevent condensate water from flowing through thecurved channel to the surface of the first sensor.

In some embodiments, the input port may be set below an upper edge ofthe main gas outlet port of the respiratory ventilation apparatus butabove a lower edge of the main gas outlet port of the respiratoryventilation apparatus.

In some embodiments, the output port may be set below the input port.

In some embodiments, the gas parameter detection assembly may be furtherconfigured to detect a flux of one or more gases in one or more passagesof the respiratory ventilation apparatus.

In some embodiments, the gas parameter detection assembly may furtherinclude: a second sensor configured to detect a flux signal associatedwith the one or more gases in the one or more passages of therespiratory ventilation apparatus; a second tube configured to introducea gas flow from the acquisition part to a surface of the second sensor;an auxiliary acquisition port set at upstream of the one or more gases;and a third tube configured to introduce a gas flow from the auxiliaryacquisition port to a surface of the second sensor.

In some embodiments, the first sensor and the second sensor may share asame acquisition part.

In some embodiments, the second sensor may be a flow sensor.

In some embodiments, the acquisition part may include silicone.

In some embodiments, the acquisition part may be in detachableconnection with the respiratory ventilation apparatus.

In some embodiments, the respiratory ventilation apparatus may furtherinclude a pressure sensor and a flow sensor for snore detection, and ahumidified gas inlet port configured to introduce pressurized andhumidified gas from a humidification assembly; and the pressure sensorand the flow sensor may be connected via a curved channel to a sectionbetween the main gas outlet port of the respiratory ventilationapparatus and the humidified gas inlet port.

In some embodiments, the gas parameter detection assembly may beconfigured to detect one or more gas parameters of the humidified andpressurized respiratory gas.

In some embodiments, the respiratory ventilation apparatus may furtherinclude a humidification assembly configured to generate the humidifiedand pressurized respiratory gas, and the gas parameter detectionassembly may include an acquisition part placed in a downstream of thehumidified and pressurized respiratory gas relative to thehumidification assembly.

In some embodiments, an input port of the acquisition part may be setbelow an upper edge of the main gas outlet port of the respiratoryventilation apparatus but above a lower edge of the main gas outlet portof the respiratory ventilation apparatus.

In some embodiments, a respiratory ventilation apparatus configured todeliver a respiratory gas to a patient interface may include: a gaspressurization unit being located in a main body of the respiratoryventilation apparatus; a humidification assembly being removably coupledto the main body of the respiratory ventilation apparatus, thehumidification assembly including a liquid chamber configured toaccommodate one or more liquids; wherein the liquid chamber may be indetachable connection with the main body of the respiratory ventilationapparatus through a push-push mechanism.

In some embodiments, the gas pressurization unit may be configured togenerate a pressurized respiratory gas by pressurizing the respiratorygas, wherein the main body of the respiratory ventilation apparatusincludes a housing with a first side wall configured to discharge thepressurized respiratory gas; the humidification assembly may beconfigured to humidify the pressurized respiratory gas; the respiratoryventilation apparatus may further include: a gas inlet port configuredto introduce the respiratory gas into the respiratory ventilationapparatus, the gas inlet port being set on a second side wall of thehousing of the main body of the respiratory ventilation apparatus; and agas outlet port configured to discharge the humidified and pressurizedrespiratory gas to a respiration tube.

In some embodiments, the push-push mechanism may include: a guide slotset on the main body of the respiratory ventilation apparatus; a slideblock set on the main body of the respiratory ventilation apparatus, theslide block being positioned in the guide slot, the slide block beingmovable along the guide slot in a first direction back and forth; and apushrod set on the liquid chamber, the pushrod being movable along asecond direction back and forth, the second direction beingperpendicular to the first direction; wherein the slide block mayinclude a guide block, the guide block including a first slope, a grooveand a second slope, the guide block being configured to guide or limit amoving position of the pushrod.

In some embodiments, an inclined direction of the first slope may bedifferent from an inclined direction of the second slope; and a firstangle between the first slope and a vertical direction may be greaterthan a second angle between the second slope and the vertical direction.

In some embodiments, the guide block may have a frame similar tocharacter A.

In some embodiments, the push-push mechanism may further include: afirst spring including a first end and a second end, the first end ofthe first spring being connected to a first end of the guide block, thesecond end of the first spring being fixed to the main body of therespiratory ventilation apparatus; and a second spring including a firstend and a second end, the first end of the second spring being connectedto a second end of the guide block, the second end of the second springbeing fixed to the main body of the respiratory ventilation apparatus;wherein the first spring may be capable of being compressed when theguide block is driven to move along the first direction; and thecompressed first spring may be capable of driving the guide block tomove along an opposite direction of the first direction.

In some embodiments, upon being driven by a first pushing force, thepushrod may be capable of pushing the guide block to move along thefirst direction while the pushrod is moving along the second directionand sliding down along the first slope of the guide block; uponreleasing the first pushing force, the pushrod may be capable of movingalong an opposite direction of the second direction while the guideblock is moving along an opposite direction of the first direction sothat the pushrod is stuck into the groove of the guide block; upon beingdriven by a second pushing force, the pushrod may be capable of movingalong the second direction and moving out of the groove while the guideblock is moving along the opposite direction of the first direction sothat the pushrod is released from the groove; and upon releasing thesecond pushing force, the pushrod may be capable of moving along theopposite direction of the second direction and sliding up along thesecond slope of the guide block, while the guide block is moving alongthe opposite direction of the first direction, so that the liquidchamber is released from the main body.

In some embodiments, the slide block may further include a bump belowthe groove of the guide block, the bump being configured to guide thepushrod to be stuck into the groove upon releasing the first pushingforce.

In some embodiments, the pushrod may be set below a bottom surface ofthe liquid chamber; the guide slot and the slide block may be set belowan interface of the liquid chamber and the main body of the respiratoryventilation apparatus; a plate on the interface may include a firsthole; and the pushrod may be capable of passing through the first holeto interact with the slide block.

In some embodiments, the plate on the interface may include a secondhole; the humidification assembly may further include a heater plate,the heater plate being configured to heat the one or more liquids andgenerate vapor to humidify the pressurized respiratory gas; and theheater plate may be mounted on a base of the respiratory ventilationapparatus through one or more springs, so that the heater plate iscapable of moving up and down through the second hole upon being drivenby a pressure or upon releasing the pressure.

In some embodiments, the liquid chamber may include a bottom, the bottomincluding a metallic heat conducting material; and the bottom of theliquid chamber may be in close contact with the heater plate when theliquid chamber is mounted on the main body of the respiratoryventilation apparatus.

In some embodiments, the gas outlet port may be set on the main body ofthe respiratory ventilation apparatus.

In some embodiments, the gas outlet port may be set on the liquidchamber.

In some embodiments, the push-push mechanism may be configured forunlocking the liquid chamber from the main body of the respiratoryventilation apparatus by pushing the liquid chamber in a push directionsubstantially perpendicular to a liquid level in the liquid chamber.Since pushing is easier than pulling and can be performed singlehandedly, the user comfort is improved. In addition thereto, any lockingand/or connecting mechanism between the liquid chamber and the main bodywill experience less pulling force and their life time is increased,since such mechanism usually can withstand much higher pushing forcethan pulling force. In addition thereto, pushing to unlock alsodecreases the chance that the liquid is spilled out from the tank duringdisassembling.

In some embodiments, the push-push mechanism may be configured tocomprise an energy storage means for storing the energy of the pushingaction and for releasing the stored energy after the liquid chamber isunlocked by applying a force on the liquid chamber substantially in theopposite direction of the push direction.

In some embodiments, the liquid chamber may include: a tank; and a tankcover pivotally connected to the tank through a connection mechanism;wherein the tank cover may be configured to be closable by pushing inthe push direction and/or is configured to be openable by pullingsubstantially in a direction opposite to the push direction. As the tankcover can be closed in the same direction, one single pushing action canclose the tank cover and attach the liquid chamber to the main body atthe same time, thus increases the comfort. As the tank cover is openedin the opposite direction, the chance for user to mix up opening thetank cover and removing the liquid chamber from the main body isminimized, thus avoiding the situation that the user accidentally openthe tank cover while intending only to disconnect the humidificationassembly and spill the liquid out.

In some embodiments, a method for operating a respiratory ventilationapparatus may include comprising: coupling the humidification assemblywith the main body of the respiratory ventilation apparatus by pushingthe liquid chamber in a push direction, and unlocking the humidificationassembly with the main body by pushing the liquid chamber substantiallyin the push direction.

In some embodiments, the liquid chamber may include: a tank; and a tankcover pivotally connected to the tank through a connection mechanism;and the method may further include: placing the humidification assemblyon a surface of the respiratory ventilation apparatus before the step ofcoupling; the step of coupling the humidification assembly may furtherinclude locking the tank cover with the tank by pushing the tank coversubstantially in the push direction.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure is further described in terms of exemplaryembodiments. These exemplary embodiments are described in detail withreference to the drawings. The drawings are not to scale. Theseembodiments are non-limiting exemplary embodiments, in which likereference numerals represent similar structures throughout the severalviews of the drawings, and wherein:

FIG. 1 is a schematic diagram illustrating an exemplary system fordelivering a respiratory gas according to some embodiments of thepresent disclosure;

FIG. 2 is a block diagram illustrating an exemplary respiratoryventilation apparatus according to some embodiments of the presentdisclosure;

FIGS. 3A-3D illustrate an exemplary respiratory ventilation apparatusaccording to some embodiments of the present disclosure;

FIG. 4 illustrates an exemplary process for delivering a respiratory gasaccording to some embodiments of the present disclosure;

FIGS. 5A-5E illustrate exemplary gas passages of a respiratoryventilation apparatus according to some embodiments of the presentdisclosure;

FIGS. 6A-6E illustrate an exemplary gas filter component according tosome embodiments of the present disclosure;

FIGS. 7A and 7B illustrate an exemplary gas filter unit according tosome embodiments of the present disclosure;

FIGS. 8A-8D illustrate different views of an exemplary noise reductionassembly according to some embodiments of the present disclosure;

FIGS. 9A-9E illustrate an exemplary connection between a noise reductionassembly and a main body of a respiratory ventilation apparatusaccording to some embodiments of the present disclosure;

FIGS. 10A-10C illustrate exemplary exploded views of a noise reductionassembly according to some embodiments of the present disclosure;

FIGS. 11A-11F illustrate an exemplary connection between a gaspressurization unit and a noise reduction box according to someembodiments of the present disclosure;

FIGS. 12A-12C illustrate an exemplary gas pressurization unit accordingto some embodiments of the present disclosure;

FIGS. 13A and 13B illustrate an exemplary connecting piece according tosome embodiments of the present disclosure;

FIGS. 14A and 14B illustrate an exemplary respiratory ventilationapparatus including a gas parameter detection assembly according to someembodiments of the present disclosure;

FIGS. 15A and 15B illustrate an inner space of an exemplary respiratoryventilation apparatus including a gas parameter detection assemblyaccording to some embodiments of the present disclosure;

FIGS. 16A-16D illustrate an exemplary acquisition part of a gasparameter detection assembly and/or a flow detection assembly accordingto some embodiments of the present disclosure;

FIG. 17 illustrates an exemplary respiratory ventilation apparatusaccording to some embodiments of the present disclosure;

FIGS. 18A and 18B illustrate exploded views of an exemplary liquidchamber according to some embodiments of the present disclosure;

FIG. 19 illustrates an exemplary push-push mechanism in connection witha liquid chamber of a respiratory ventilation apparatus according tosome embodiments of the present disclosure;

FIGS. 20A and 20B illustrate an exemplary push-push mechanism accordingto some embodiments of the present disclosure;

FIGS. 21A and 21B illustrate an exemplary process for mounting a liquidchamber on a main body of a respiratory ventilation apparatus by apush-push mechanism according to some embodiments of the presentdisclosure;

FIGS. 21C and 21D illustrate an exemplary process for removing a liquidchamber from a main body of a respiratory ventilation apparatus by apush-push mechanism according to some embodiments of the presentdisclosure;

FIGS. 22A-22D illustrate an exemplary heater plate according to someembodiments of the present disclosure;

FIG. 23A-23D illustrate an exemplary connection between a liquid chamberand a main body of a respiratory ventilation apparatus according to someembodiments of the present disclosure;

FIG. 24 illustrates another exemplary connection between a liquidchamber and a main body of a respiratory ventilation apparatus accordingto some embodiments of the present disclosure;

FIG. 25 illustrates an exemplary connection piece fixed to a main bodyof a respiratory ventilation apparatus according to some embodiments ofthe present disclosure;

FIGS. 26A-26C illustrate an exemplary connection between a liquidchamber and a main body of a respiratory ventilation apparatus accordingto some embodiments of the present disclosure;

FIG. 27 illustrates an exemplary connection between a connecting pieceand a connecting plate of a tank cover when the tank cover is closedaccording to some embodiments of the present disclosure;

FIGS. 28A-28E illustrate exemplary thread hoses of a connecting pieceaccording to some embodiments of the present disclosure;

FIG. 29A-29D illustrate an exemplary baseplate of a respiratoryventilation apparatus according to some embodiments of the presentdisclosure;

FIGS. 30A and 30B illustrate an exemplary liquid chamber of arespiratory ventilation apparatus according to some embodiments of thepresent disclosure;

FIG. 31 illustrates an exemplary tank cover of a liquid chamber of arespiratory ventilation apparatus according to some embodiments of thepresent disclosure;

FIGS. 32A-32C illustrate an exemplary tank of a liquid chamber of arespiratory ventilation apparatus according to some embodiments of thepresent disclosure;

FIGS. 33A and 33B illustrate an exemplary tank according to someembodiments of the present disclosure;

FIGS. 34A and 34B illustrate an exemplary tank cover according to someembodiments of the present disclosure;

FIGS. 35A and 35B illustrate a corporation of a protruding column of afirst connecting piece of a tank and a groove of a second connectingpiece of a tank cover according to some embodiments of the presentdisclosure;

FIGS. 36A and 36B illustrate an exemplary connection between a tank anda tank cover of a liquid chamber according to some embodiments of thepresent disclosure;

FIGS. 37A and 37B illustrate an exemplary tank cover according to someembodiments of the present disclosure;

FIG. 38 illustrates an exemplary cover shell according to someembodiments of the present disclosure;

FIGS. 39A and 39B illustrate an exemplary inner shell of a tank coveraccording to some embodiments of the present disclosure;

FIG. 40 illustrates an exemplary bottom plate of an inner shell of atank cover according to some embodiments of the present disclosure;

FIGS. 41A and 41B illustrate an exemplary inner structure of an innershell of a tank cover according to some embodiments of the presentdisclosure;

FIGS. 42A and 42B illustrate another exemplary tank cover according tosome embodiments of the present disclosure;

FIGS. 43A-43C illustrate exemplary electronic components in a main bodyof a respiratory ventilation apparatus according to some embodiments ofthe present disclosure;

FIGS. 44A and 44B illustrate an exemplary heating device according tosome embodiments of the present disclosure; and

FIG. 45 illustrates an exemplary liquid chamber according to someembodiments of the present disclosure.

DETAILED DESCRIPTION

The following description is presented to enable any person skilled inthe art to make and use the present disclosure and is provided in thecontext of a particular application and its requirements. Variousmodifications to the disclosed embodiments will be readily apparent tothose skilled in the art, and the general principles defined herein maybe applied to other embodiments and applications without departing fromthe spirit and scope of the present disclosure. Thus, the presentdisclosure is not limited to the embodiments shown but is to be accordedthe widest scope consistent with the claims.

The terminology used herein is to describe particular exemplaryembodiments only and is not intended to be limiting. As used herein, thesingular forms “a,” “an,” and “the” may be intended to include theplural forms as well, unless the context expressly indicates otherwise.It will be further understood that the terms “comprise,” “comprises,”and/or “comprising,” “include,” “includes,” and/or “including,” whenused in the present disclosure, specify the presence of stated features,integers, steps, operation, elements, and/or components, but do notpreclude the presence or addition of one or more other features,integers, steps, operation, elements, components, and/or groups thereof.

These and other features, and characteristics of the present disclosure,as well as the methods of operation and functions of the relatedelements of structure and the combination of parts and economies ofmanufacture, may become more apparent upon consideration of thefollowing description with reference to the accompanying drawings, allof which form a part of the present disclosure. It is to be expresslyunderstood, however, that the drawings are for illustration anddescription only, and are not intended to limit the scope of the presentdisclosure. It is understood that the drawings are not to scale.

It will be understood that the term “system,” “engine,” “unit,” and/or“module” used herein are one method to distinguish different components,elements, parts, sections, or assemblies of different levels inascending order. However, the terms may be displaced by otherexpressions if they achieve the same purpose.

It will be understood that when a unit, engine, or module is referred toas being “on,” “connected to,” or “coupled to,” another unit, engine, ormodule, it may be directly on, connected or coupled to, or communicatewith the other unit, engine, or module, or an intervening unit, engine,or module may be present, unless the context clearly indicatesotherwise. As used herein, the term “and/or” includes any and allcombinations of one or more of the associated listed items.

The term “ambient” used herein refers to the external of the system 100and/or the subject 180, or surrounding the system 100 and/or the subject180. The “ambient gas” used herein may refer to the gas at the externalof the system 100 and/or the subject 180, or surrounding the system 100and/or the subject 180. The term “ambient humidity” with respect to ahumidifier may refer to the humidity of gas surrounding the humidifier(e.g. the humidity in the room where the respiratory ventilationapparatus 110 and/or the subject 180 are located). The term “ambientpressure” may refer to the pressure surrounding or external to thesubject 180. The term “ambient (e.g. acoustic) noise” may refer to thebackground noise level in the room where the respiratory ventilationapparatus 110 and/or the subject 180 are located), other than forexample, noise generated by the respiratory ventilation apparatus 110 oremanating from the subject interface 170.

The flowcharts used in the present disclosure illustrate operation thatsystems implement according to some embodiments of the presentdisclosure. It is to be expressly understood, the operation of theflowcharts may be implemented not in order. Conversely, the operationmay be implemented in inverted order, or simultaneously. Moreover, oneor more other operation may be added to the flowcharts. One or moreoperations may be omitted from the flowcharts.

FIG. 1 is a schematic diagram illustrating an exemplary system fordelivering a respiratory gas according to some embodiments of thepresent disclosure. In some embodiments, the respiratory gas may includenatural air (or atmospheric air), purified air, oxygen, atmospheric airenriched with oxygen, a therapeutic drug, pressurized air, humidifiedair, or the like, or a combination thereof. As illustrated, the system100 may include a respiratory ventilation apparatus 110, a respirationtube 160, and a subject interface 170. In some embodiments, therespiratory ventilation apparatus 110 may be a non-invasive ventilator.In some embodiments, the system 100 may further include a network 120, aterminal 130, a processing device 140, and a storage device 150. Itshould be noted that one or more of the network 120, the terminal 130,the processing device 140, and the storage device 150 may be omitted.The components in the system 100 may be connected in one or more ofvarious ways. Merely by way of example, as illustrated in FIG. 1, therespiratory ventilation apparatus 110 may be connected to the processingdevice 140 through the network 120. As another example, the respiratoryventilation apparatus 110 may be connected to the processing device 140directly as indicated by the bi-directional arrow in dotted lineslinking the respiratory ventilation apparatus 110 and the processingdevice 140. As a further example, the storage device 150 may beconnected to the processing device 140 directly or through the network120. As still a further example, the terminal 130 may be connected tothe processing device 140 directly (as indicated by the bi-directionalarrow in dotted lines linking the terminal 130 and the processing device140) or through the network 120. In the present disclosure, “respiratoryventilation apparatus” and “continuous positive airway pressure (CPAP)apparatus” are used interchangeably.

The respiratory ventilation apparatus 110 may be configured to detect,diagnose, treat, prevent, and/or ameliorate respiratory-relateddisorders of a subject 180. In some embodiments, the respiratoryventilation apparatus 110 may deliver a pressurized respiratory gas to asubject 180 (e.g., the nose and/or the mouth of the subject 180). Insome embodiments, the respiratory ventilation apparatus 110 may includea gas inlet port 112 and a gas outlet port 111. The gas inlet port 112may be configured to introduce a respiratory gas into the respiratoryventilation apparatus 110. In some embodiments, the respiratoryventilation apparatus 110 may pressurize the respiratory gas introducedvia the gas inlet port 112. In some embodiments, the gas outlet port 111may be connected to the respiration tube 160. The gas outlet port 111may be configured to discharge the pressurized respiratory gas to therespiration tube 160. In some embodiments, the respiration tube 160 maybe connected to the subject interface 170. Therefore, the pressurizedrespiratory gas generated by the respiratory ventilation apparatus 110may be discharged to the subject 180 via the respiration tube 160 andthe subject interface 170. In some embodiments, the respiratoryventilation apparatus 110 may include one or more gas passages (notshown in FIG. 1) configured to guide the respiratory gas to flow in therespiratory ventilation apparatus 110. More descriptions of therespiratory ventilation apparatus 110 may be found elsewhere in thepresent disclosure (e.g., FIGS. 3A-3D and 5A-5E and the descriptionsthereof).

In some embodiments, the respiratory ventilation apparatus 110 mayfurther include one or more controllers. The controllers may connect toone or more components of the respiratory ventilation apparatus 110directly or via a network (e.g., a wired network, a wireless network).The controllers may control the operation(s) of one or more componentsof the respiratory ventilation apparatus 110. In some embodiments, thecontroller(s) may be configured to initiate the respiratory ventilationapparatus 110 upon a boot operation. For example, the controller(s) mayinitiate a random access memory of the respiratory ventilation apparatus110, read one or more parameters from one or more storage device 150(e.g., a non-volatile memory) of the respiratory ventilation apparatus110, and/or initiate the detection module 250. In some embodiments, theparameter(s) may include at least one parameter used to control thepressure of the pressurized respiratory gas. In some embodiments, thecontroller(s) may be configured to initiate a program that constantlyreads information from the detection module 250, and control thepressure of the pressurized respiratory gas using at least theinformation read from the detection module 250 and one or more of theparameter(s).

In some embodiments, the respiratory ventilation apparatus 110 mayfurther include or be equipped with one or more sensors configured todetect parameters relating to the respiratory gas, the expired gas ofthe subject 180, and/or the operation status of the respiratoryventilation apparatus 110. The parameters relating to the respiratorygas may include, for example, the flux of the respiratory gas, a flowrate of the respiratory gas, a temperature of the respiratory gas, ahumidity of the respiratory gas, or the like, or a combination thereof.The parameters relating to the expired gas of the subject 180 mayinclude a snore of the subject 180, a respiratory rate of the subject180, a tidal volume of the subject 180, a pressure of the expired gas ofthe subject 180, an air leakage of the expired gas of the subject 180,an autonomous respiration ratio of the subject 180, or the like, or acombination thereof. The parameters relating to the operation status ofthe respiratory ventilation apparatus 110 may include a running time ofthe respiratory ventilation apparatus 110, a time of delay forpressurizing the respiratory gas, an air leakage of the pressurizedrespiratory gas, an input voltage of the gas pressurization unit 210, orthe like, or a combination thereof.

In some embodiments, the respiratory ventilation apparatus 110 mayfurther include or be equipped with one or more gas filter unitsconfigured to filter and/or purify the respiratory gas delivered to thesubject 180. In some embodiments, the gas filter unit(s) (e.g., a coarsefilter, a fine filter, or the like) may filter one or more particles inthe respiratory gas. In some embodiments, the gas filter unit(s) mayfilter bacteria in the respiratory gas. In some embodiments, the gasfilter unit(s) may filter pungent gas in the respiratory gas.

In some embodiments, the subject 180 may be a healthy person. In someembodiments, the subject 180 may be a patient. In some embodiments, thepatient may have one or more respiratory-related disorders. In someembodiments, the respiratory-related disorders may be characterized byapneas, hypopneas, or hyperpneas, or the like. Exemplaryrespiratory-related disorders may include, for example, obstructivesleep apnea (OSA), Cheyne-stokes respiration (CSR), obesityhyperventilation syndrome (OHS), chronic obstructive pulmonary disease(COPD), neuromuscular disease (NMD), chest wall disorders, or the like.The obstructive sleep apnea (OSA) is a form of sleep disorderedbreathing, and may cause affected patient to stop breathing for one ormore periods (e.g., 30 to 120 seconds duration, or 200 to 300 times pernight). The Cheyne-stokes respiration (CSR) is another form of sleepdisordered breathing, and may be harmful because of repetitive hypoxia.The obesity hyperventilation syndrome (OHS) is defined as thecombination of severe obesity and awake chronic hypercapnia, and maycause dyspnea, morning headache, excessive daytime sleepiness, or thelike. The chronic obstructive pulmonary disease (COPD) may includeincreased resistance to air movement, extended expiratory phase ofrespiration, or loss of the normal elasticity of the lung, or the like.The chronic obstructive pulmonary disease (COPD) may cause dyspnea onexertion, chronic cough, sputum production, or the like. Theneuromuscular disease (NMD) may include diseases and ailments thatimpair the functioning of the muscles either directly via intrinsicmuscle pathology, or indirectly via nerve pathology. The neuromusculardisease (NMD) may cause increasing generalized weakness, dysphagia,dyspnea on exertion and at rest, fatigue, sleepiness, morning headache,difficulties with concentration and mood changes, or the like. The chestwall disorders are a group of thoracic deformities that result ininefficient coupling between respiratory muscles and the thoracic cage.The chest wall disorders may cause dyspnea on exertion, peripheraledema, orthopnea, repeated chest infections, morning headaches, fatigue,poor sleep quality, loss of appetite, or the like.

In some embodiments, the subject interface 170 may be configured tointerface the respiratory ventilation apparatus 110 to the subject 180,for example, by providing a flow of respiratory gas (e.g., air). In someembodiments, the subject interface 170 may include a gas passage toguide the respiratory gas. The subject interface 170 may include a mask,a tube, or the like. For example, the subject interface 170 may be anasal mask, a full-face mask, a tube connected to the mouth of thesubject 180, a tracheostomy tube connected to the trachea of the subject180. In some embodiments, the subject interface 170 may form a sealedconnection with a face region of the subject 180 to facilitate thedelivery of the respiratory gas at a pressure that has a sufficientvariance with ambient pressure to effect therapy (e.g., a positivepressure of about 10 cmH₂O). For example, the subject interface 170 maybe fixed to the nose of the subject 180 by various fixing ways (e.g.,through a fixing rope or a fixing ring). In some embodiments, thesubject interface 170 may not form a sealed connection with a faceregion of the subject 180 that is sufficient to facilitate delivery ofthe respiratory gas to the subject 180 at a positive pressure of about10 cmH₂O. In some embodiments, the subject interface 170 may furtherinclude a filter configured to filter the respiratory gas. Moredescriptions of the filter may be found elsewhere in the presentdisclosure (e.g., FIGS. 6A-6E, 7A, and 7B and the descriptions thereof).In some embodiments, the subject interface 170 may further include or beequipped with one or more sensors configured to detect parametersrelating to the respiratory gas and/or the expired gas of the subject180. In some embodiments, the subject interface 170 may further includeor be equipped with one or more gas filter units configured to filterand/or purify the respiratory gas delivered to the subject 180. In someembodiments, the gas filter unit(s) (e.g., a coarse filter, a finefilter, or the like) may filter one or more particles in the respiratorygas. In some embodiments, the gas filter unit(s) may filter bacteria inthe respiratory gas. In some embodiments, the gas filter unit(s) mayfilter pungent gas in the respiratory gas.

In some embodiments, the respiration tube 160 may be configured to guidethe respiratory gas from the respiratory ventilation apparatus 110 tothe subject interface 170. The respiration tube 160 may include a gaspassage to guide the respiratory gas. In some embodiments, therespiration tube 160 may form a sealed connection with the gas outletport 111 of the respiratory ventilation apparatus 110. In someembodiments, the respiration tube 160 may form a sealed connection withthe subject interface 170. In some embodiments, the respiration tube 160may further include a heater configured to heat the respiration tube160, so that the respiratory gas flowing through the respiration tube160 can be maintained at a certain temperature, preferably, at atemperature that human beings are comfortable with, such as, atemperature within 16-43° C., a temperature within 28-38° C. In someembodiments, the respiration tube 160 may further include or be equippedwith one or more sensors configured to detect parameters relating to therespiratory gas and/or the expired gas of the subject 180. In someembodiments, the respiration tube 160 may further include or be equippedwith one or more gas filter units configured to filter and/or purify therespiratory gas delivered to the subject 180. In some embodiments, thegas filter unit(s) (e.g., a coarse filter, a fine filter, or the like)may filter one or more particles in the respiratory gas. In someembodiments, the gas filter unit(s) may filter bacteria in therespiratory gas. In some embodiments, the gas filter unit(s) may filterpungent gas in the respiratory gas.

In some embodiments, the network 120 may include any suitable networkthat can facilitate the exchange of information and/or data for thesystem 100. In some embodiments, one or more components of the system100 (e.g., the respiratory ventilation apparatus 110, the terminal 130,the processing device 140, or the storage device 150) may communicateinformation and/or data with one or more other components of the system100 via the network 120. For example, the processing device 140 mayobtain signals from the respiratory ventilation apparatus 110 via thenetwork 120. As another example, the processing device 140 may obtainuser instructions from the terminal 130 via the network 120. In someembodiments, the network 120 may be any type of wired or wirelessnetwork, or a combination thereof. The network 120 may be and/or includea public network (e.g., the Internet), a private network (e.g., a localarea network (LAN), a wide area network (WAN)), etc.), a wired network(e.g., an Ethernet network), a wireless network (e.g., an 802.11network, a Wi-Fi network, etc.), a cellular network (e.g., a Long TermEvolution (LTE) network), a frame relay network, a virtual privatenetwork (“VPN”), a satellite network, a telephone network, routers,hubs, switches, server computers, and/or any combination thereof. Merelyby way of example, the network 120 may include a cable network, awireline network, a fiber-optic network, a telecommunications network,an intranet, a wireless local area network (WLAN), a metropolitan areanetwork (MAN), a public telephone switched network (PSTN), a Bluetooth™network, a ZigBee™ network, a near field communication (NFC) network, orthe like, or any combination thereof. In some embodiments, the network120 may include one or more network access points. For example, thenetwork 120 may include wired and/or wireless network access points suchas base stations and/or internet exchange points through which one ormore components of the system 100 may be connected to the network 120 toexchange data and/or information.

In some embodiments, the terminal 130 may include a mobile device 130-1,a tablet computer 130-2, a laptop computer 130-3, or the like, or anycombination thereof. In some embodiments, the mobile device 130-1 mayinclude a smart home device, a wearable device, a smart mobile device, avirtual reality device, an augmented reality device, or the like, or anycombination thereof. In some embodiments, the smart home device mayinclude a smart lighting device, a control device of an intelligentelectrical apparatus, a smart monitoring device, a smart video camera,an interphone, or the like, or any combination thereof. In someembodiments, the wearable device may include a smart bracelet, smartfootgear, a pair of smart glasses, a smart helmet, a smartwatch, smartclothing, a smart backpack, a smart accessory, or the like, or anycombination thereof. In some embodiments, the smart mobile device mayinclude a smartphone, a personal digital assistant (PDA), a gamingdevice, a navigation device, a point of sale (POS) device, or the like,or any combination thereof. In some embodiments, the virtual realitydevice and/or the augmented reality device may include a virtual realityhelmet, a virtual reality glass, a virtual reality patch, an augmentedreality helmet, an augmented reality glass, an augmented reality patch,or the like, or any combination thereof. For example, the virtualreality device and/or the augmented reality device may include GoogleGlasses, an Oculus Rift, a Hololens, a Gear VR, etc. In someembodiments, the terminal 130 may remotely operate the respiratoryventilation apparatus 110. In some embodiments, the terminal 130 mayoperate the respiratory ventilation apparatus 110 via a wirelessconnection. In some embodiments, the terminal 130 may receiveinformation and/or instructions inputted by a user, and send thereceived information and/or instructions to the respiratory ventilationapparatus 110 or to the processing device 140 via the network 120. Insome embodiments, the terminal 130 may receive data and/or informationfrom the processing device 140. In some embodiments, the terminal 130may display information relating to the system 100. In some embodiments,the terminal 130 may be part of the processing device 140. In someembodiments, the terminal 130 may be omitted. In some embodiments, viathe terminal 130, a user may remotely update software of the respiratoryventilation apparatus 110, and/or adjust or set one or more parametersof the respiratory ventilation apparatus 110.

In some embodiments, the processing device 140 may process data and/orinformation obtained from the respiratory ventilation apparatus 110, theterminal 130, and/or the storage device 150. For example, the processingdevice 140 may obtain signals detected by one or more sensors in therespiratory ventilation apparatus 110, the respiration tube 160, and/orthe subject interface 170, and may process and/or analyze the signals toobtain one or more parameters relating to the respiratory gas, theexpired gas of the subject 180, and/or the operation status of therespiratory ventilation apparatus 110. In some embodiments, theprocessing device 140 may be a single server, or a server group. Theserver group may be centralized, or distributed. In some embodiments,the processing device 140 may be local or remote. For example, theprocessing device 140 may access information and/or data stored in therespiratorypressuretherapydevice110, the terminal 130, and/or thestorage device 150 via the network 120. As another example, theprocessing device 140 may be directly connected to the respiratoryventilation apparatus 110, the terminal 130, and/or the storage device150 to access stored information and/or data. In some embodiments, theprocessing device 140 may be implemented on a cloud platform. Merely byway of example, the cloud platform may include a private cloud, a publiccloud, a hybrid cloud, a community cloud, a distributed cloud, aninter-cloud, a multi-cloud, or the like, or any combination thereof. Insome embodiments, the processing device 140 may be implemented on acomputing device of the respiratory ventilation apparatus 110.

In some embodiments, the processing device 140 may include anacquisition unit and a processing unit. The acquisition unit may beconfigured to obtain information relating to the system 100 (e.g., therespiratory ventilation apparatus 110, the processing device 140, thestorage device 150, the terminal 130, etc.). The information may includesignals detected by the detection module 250, data read from the storagedevice 150, instructions or data provided by the terminal 130, etc. Insome embodiments, the information may be transmitted to the processingunit for processing. In some embodiments, the acquisition unit mayobtain or transmit the information via a tangible transmission media ora Carrier-wave transmission media. The tangible transmission media mayinclude, for example, a coaxial cable, a copper wire, a fiber optics, orthe like. The Carrier-wave transmission media may take the form ofelectric or electromagnetic signals (e.g., signals generated duringradio frequency (RF) data communications). The processing unit may beconfigured to process the information obtained by the acquisition unit.The processing unit may include an advanced RISC machines processor(ARM), a programmable logic device (PLD), a microprogrammed control unit(MCU), a digital signal processor (DSP), a field-programmable gate array(FPGA), a system on chip (SoC) or the like, or any combination thereof.

In some embodiments, the storage device 150 may store data and/orinstructions. In some embodiments, the storage device 150 may store dataor information obtained from the respiratory ventilation apparatus 110.For example, the processing device 140 may determine one or moreparameters relating to the respiratory gas, the expired gas of thesubject 180, and/or the operation status of the respiratory ventilationapparatus 110 based on the signals obtained from one or more sensors ofthe respiratory ventilation apparatus 110, the respiration tube 160,and/or the subject interface 170. The determined parameter(s) may bestored in the storage device 150 for further use or processing. In someembodiments, the storage device 150 may store data obtained from theterminal 130 and/or the processing device 140. In some embodiments, thestorage device 150 may store data and/or instructions that theprocessing device 140 may execute or use to perform exemplary methodsdescribed in the present disclosure. In some embodiments, the storagedevice 150 may include a mass storage device, removable storage device,a volatile read-and-write memory, a read-only memory (ROM), or the like,or any combination thereof. Exemplary mass storage may include amagnetic disk, an optical disk, a solid-state drive, etc. Exemplaryremovable storage may include a flash drive, a floppy disk, an opticaldisk, a memory card, a zip disk, a magnetic tape, etc. Exemplaryvolatile read-and-write memory may include a random access memory (RAM).Exemplary RAM may include a dynamic RAM (DRAM), a double date ratesynchronous dynamic RAM (DDR SDRAM), a static RAM (SRAM), a thyristorRAM (T-RAM), and a zero-capacitor RAM (Z-RAM), etc. Exemplary ROM mayinclude a mask ROM (MROM), a programmable ROM (PROM), an erasableprogrammable ROM (PEROM), an electrically erasable programmable ROM(EEPROM), a compact disk ROM (CD-ROM), and a digital versatile disk ROM,etc. In some embodiments, the storage device 150 may be implemented on acloud platform. Merely by way of example, the cloud platform may includea private cloud, a public cloud, a hybrid cloud, a community cloud, adistributed cloud, an inter-cloud, a multi-cloud, or the like, or anycombination thereof.

In some embodiments, the storage device 150 may be connected to thenetwork 120 to communicate with one or more components in the system 100(e.g., the respiratory ventilation apparatus 110, the processing device140, the terminal 130, etc.). One or more components in the system 100may access the data or instructions stored in the storage device 150 viathe network 120. In some embodiments, the storage device 150 may bedirectly connected to or communicate with one or more components in thesystem 100 (e.g., respiratory ventilation apparatus 110, the processingdevice 140, the terminal 130, etc.). In some embodiments, the storagedevice 150 may be part of the processing device 140. In someembodiments, the storage device 150 may be part of the respiratoryventilation apparatus 110.

FIG. 2 is a block diagram illustrating an exemplary respiratoryventilation apparatus 110 according to some embodiments of the presentdisclosure. As illustrated in FIG. 2, the respiratory ventilationapparatus 110 may include a gas pressurization unit 210, ahumidification assembly 220, a gas filter component 230, a noisereduction assembly 240, a detection module 250, a control module 260,and one or more peripheral devices 270.

The gas pressurization unit 210 may be configured to pressurize therespiratory gas introduced in the respiratory ventilation apparatus 110.In some embodiments, the gas pressurization unit 210 may generate apressurized respiratory gas based on an ambient gas (e.g., atmosphericair) introduced in the respiratory ventilation apparatus 110. In someembodiments, the gas pressurization unit 210 may provide a pressurizedrespiratory gas for the subject 180. In some embodiments, the gaspressurization unit 210 may include a blower (e.g., a motor-drivenblower). In some embodiments, the gas pressurization unit 210 mayinclude a compressed gas reservoir. In some embodiments, when the bloweris running, the respiratory gas (e.g., ambient gas) can be successivelysucked into the respiratory ventilation apparatus 110 via the gas inletport 112, and then the respiratory gas can be pressurized. Thepressurized respiratory gas generated by the gas pressurization unit 210may be further discharged to the respiration tube 160 via the gas outletport 111. In some embodiments, the gas pressurization unit 210 may becontrolled by the controller(s) of the respiratory ventilation apparatus110. For example, the starting, running (e.g., the rotation speed),and/or stopping of the gas pressurization unit 210 may be controlled(and/or adjusted) by the controller(s) of the respiratory ventilationapparatus 110.

The humidification assembly 220 may be configured to humidify the(pressurized) respiratory gas. In some embodiments, the humidificationassembly 220 may humidify the (pressurized) respiratory gas byintroducing water vapor into the (pressurized) respiratory gas. In someembodiments, the humidification assembly 220 may include a liquidchamber 222 and/or a heating device 224. The liquid chamber 222 may beconfigured to accommodate one or more liquids (e.g., water). The heatingdevice 224 may be configured to heat the one or more liquidsaccommodated in the liquid chamber 222 and/or generate water vapor in atemperature range of e.g., 30-50 degree centigrade. The water vapor maybe introduced into the (pressurized) respiratory gas, and then the(pressurized) respiratory gas can be humidified. In some embodiments,the liquid chamber 222 may include a tank and/or a tank cover. The tankmay be configured to accommodate the one or more liquids. The tank covermay be configured to introduce (pressurized) respiratory gas onto thesurface of the one or more liquids, and/or introduce humidified(pressurized) respiratory gas out of the liquid chamber 222. In someembodiments, the tank cover may include a shell, a gas inlet portconfigured to introduce the (pressurized) respiratory gas, via a firstgas passage, into the liquid chamber 222, and/or a gas outlet portconfigured to introduce the humidified (pressurized) respiratory gas,via a second gas passage, back into the respiratory ventilationapparatus 110. In some embodiments, the heating device 224 may include aheater plate, one or more heating rods, one or more heating electrodes,or the like, or any combination thereof, mounted beneath a baseplate ofthe tank or inside the tank.

In some embodiments, the humidification assembly 220 may humidify the(pressurized) respiratory gas by introducing one or more water dropletsinto the (pressurized) respiratory gas. In some embodiments, thehumidification assembly 220 may include a liquid chamber 222 and/or anultrasonic atomizer (e.g., a ceramic diaphragm) not shown. The ceramicdiaphragm may be controlled by the controller(s) of the respiratoryventilation apparatus 110 to vibrate at an ultrasonic frequency togenerate a plurality of water droplets. The water droplets may beintroduced into the (pressurized) respiratory gas, and then the(pressurized) respiratory gas can be humidified. More descriptions ofthe humidification assembly 220 may be found elsewhere in the presentdisclosure (e.g., FIGS. 17-22D, 30A-36B and the descriptions thereof).

The gas filter component 230 may be configured to filter the respiratorygas introduced into the respiratory ventilation apparatus 110. In someembodiments, the gas filter component 230 may filter the pressurizedrespiratory gas discharged from the gas pressurization unit 210. In someembodiments, the gas filter component 230 may include a housing. In someembodiments, the housing of the gas filter component 230 may be indetachable connection with the gas inlet port 112 of the respiratoryventilation apparatus 110. In some embodiments, the gas filter component230 may include a plurality of gas filter units. In some embodiments,one or more of the gas filter unit(s) may be mounted in the housing. Insome embodiments, one or more of the gas filter unit(s) may be mountedin any other locations of the respiratory ventilation apparatus 110, therespiration tube 160, and/or the subject interface 170. In someembodiments, one or more of the gas filter unit(s) may be configured tofilter the respiratory gas entering the respiratory ventilationapparatus 110. In some embodiments, one or more of the gas filterunit(s) may be configured to filter the respiratory gas entering the gaspressurization unit 210. In some embodiments, one or more of the gasfilter unit(s) may be configured to filter the pressurized respiratorygas flowing from the gas pressurization unit 210. In some embodiments,one or more of the gas filter unit(s) may be configured to filter thepressurized respiratory gas entering the humidification assembly 220. Insome embodiments, one or more of the gas filter unit(s) may beconfigured to filter the humidified and pressurized respiratory gasflowing from the humidification assembly 220.

In some embodiments, the gas filter component 230 may include one ormore ultra-fine filter units mounted outside the gas inlet port 112, oneor more gas filter units mounted inside the gas inlet port 112, one ormore gas filter units with an antibacterial membrane or a deodorizationmembrane in the gas passage(s) of the respiratory ventilation apparatus110, the respiration tube 160, and/or the subject interface 170.

Merely by way of example, in some embodiments, the gas filter component230 may include a first gas filter unit. The first gas filter unit maybe a coarse filter. In some embodiments, the gas filter component 230may include a second gas filter unit. The second gas filter unit may bea fine filter. In some embodiments, the gas filter component 230 mayinclude a third gas filter unit. The third gas filter unit may bemounted inside the gas inlet port 112 of the respiratory ventilationapparatus 110. The third gas filter unit may be configured to filterambient gas entering the respiratory ventilation apparatus 110. In someembodiments, the third gas filter unit may include a coarse filterand/or a fine filter. In some embodiments, the gas filter component 230may include a fourth gas filter unit. The fourth gas filter unit may beconfigured to filter one or more gases with pungent smell (also referredto as pungent gas(es)) in one or more gas passages of the respiratoryventilation apparatus 110. In some embodiments, the fourth gas filterunit may include a membrane manufactured by one or more nanomaterialshaving adsorption ability (e.g., activated carbon, graphene, etc.). Insome embodiments, the gas filter component 230 may include a fifth gasfilter unit. The fifth gas filter unit may be configured to filterbacteria in one or more gases in one or more gas passages of therespiratory ventilation apparatus 110, the respiration tube 160, and/orthe subject interface 170. More descriptions of the gas filter component230 may be found elsewhere in the present disclosure (e.g., FIGS. 6A-7Band the descriptions thereof).

The noise reduction assembly 240 may be configured to reduce the noisegenerated by the operation of the gas pressurization unit 210 (e.g., ablower) and/or the flowing of the respiratory gas. In some embodiments,the noise reduction assembly 240 may include a noise reduction boxaccommodating the gas pressurization unit 210. In some embodiments, thenoise reduction box may include one or more sound absorbing materialsset on the inner walls of the noise reduction box. In some embodiments,the noise reduction box may include one or more frames configured to fixthe one or more sound absorbing materials. Exemplary sound absorbingmaterials may include organic fiber, inorganic fiber, inorganic foam,foam plastic, or the like, or any other material with the function ofabsorbing sound. More descriptions of the noise reduction assembly 240may be found elsewhere in the present disclosure (e.g., FIGS. 8A-11F andthe descriptions thereof).

The detection module 250 may be configured to detect one or moreparameters relating to the system 100 (e.g., the respiratory ventilationapparatus 110, the subject 180). Exemplary parameters may include theflux of the respiratory gas, a flow rate of the respiratory gas, atemperature of the respiratory gas, a humidity of the respiratory gas, asnore of the subject 180, a respiratory rate of the subject 180, a tidalvolume of the subject 180, or the like, or a combination thereof. Insome embodiments, the parameters may include operation status of therespiratory ventilation apparatus 110 (e.g., a running time of therespiratory ventilation apparatus 110, a time of delay for pressurizingthe respiratory gas, an air leakage of the pressurized respiratory gas,an input voltage of the gas pressurization unit 210, or the like).

In some embodiments, the detection module 250 may include one or moresensors configured to detect the parameter(s). Exemplary sensors mayinclude a flow sensor, a pressure sensor, a humidity sensor, atemperature sensor, a timer, etc. For example, the detection module 250may include a snoring detection assembly (e.g., a pressure sensor) (seeFIGS. 15A and 15B) configured to detect a snore of a user of therespiratory ventilation apparatus 110 (e.g., the subject 180). Asanother example, the detection module 250 may include a flow detectionassembly (see FIGS. 15A and 15B) configured to detect a flux of one ormore gases in one or more passages of the respiratory ventilationapparatus 110. In some embodiments, the detection module 250 may furtherinclude a liquid level detection assembly (e.g., a liquid level sensor)configured to detect the liquid level in the tank of the liquid chamber222.

The control module 260 may be configured to control the operation of thecomponents of the system 100 (e.g., the gas pressurization unit 210, thehumidification assembly 220, the gas filter component 230, the detectionmodule 250, the processing device 140, the storage device 150, theterminal 130, or the like). In some embodiments, the control module 260may be configured to initiate the respiratory ventilation apparatus 110upon a boot operation. For example, the control module 260 may load abootstrap program from the storage device 150, load a user program fromthe storage device 150, initiate one or more peripheral devices of thecontrol module 260 (e.g., a communication interface, a timer, an ADacquisition interface, an indicator light, a button, a knob, a powerswitch, etc.), initiate one or more sensors, initiate the gaspressurization unit 210, initiate one or more configuration parameters,and/or initiate one or more treatment parameters. As another example,the control module 260 may initiate a random access memory of therespiratory ventilation apparatus 110, read one or more parameters fromthe storage device 150 (e.g., a non-volatile memory) of the respiratoryventilation apparatus 110, and/or initiate the detection module 250. Insome embodiments, the control module 260 may be configured to initiate aprogram that constantly reads information from the detection module 250,and control the pressure of the pressurized respiratory gas using atleast the information read from the detection module 250 and one or moreof the parameters. In some embodiments, the control module 260 may causethe sensor(s) to detect one or more parameters (e.g., a pressure) of thepressurized respiratory gas, and/or adjust a rotated speed of the gaspressurization unit 210 to maintain the detected pressure of thepressurized respiratory gas within a predetermined range. In someembodiments, in response to an abnormal condition determined based on acomparison between a current state of the respiratory ventilationapparatus 110 and the plurality of parameters read from the storagedevice 150, the control module 260 may cause the respiratory ventilationapparatus 110 to provide an alert or reminder to a user. In someembodiments, the current state of the respiratory ventilation apparatus110 may include the pressure of the respiratory gas. In someembodiments, the parameter(s) read from the storage device 150 mayinclude one or more thresholds relating to an upper limit of thepressure, an upper limit of an air leakage of the pressurizedrespiratory gas, a lower limit of the air leakage of the pressurizedrespiratory gas, a lower limit of a respiratory rate, or a lower limitof an input voltage of the respiratory ventilation apparatus 110, or thelike. In some embodiments, the control module 260 may adjust the rotatedspeed of the gas pressurization unit 210 to pressurize the respiratorygas with a delay after the initiation of the respiratory ventilationapparatus 110.

The control module 260 may be implemented as software and/or hardwaremodules (e.g., controllers) and may be stored in any type ofnon-transitory computer-readable medium or other storage device. Forexample, the control module 260 may be stored in the processing device140. In some embodiments, a software module may be compiled and linkedinto an executable program. It will be appreciated that software modulescan be callable from other modules or from themselves, and/or can beinvoked in response to detected events or interrupts. Software modulesconfigured for execution on computing devices (e.g., a processor of theprocessing device 140) can be provided on a computer-readable medium,such as a compact disc, a digital video disc, a flash drive, a magneticdisc, or any other tangible medium, or as a digital download (and can beoriginally stored in a compressed or installable format that requiresinstallation, decompression, or decryption prior to execution). Suchsoftware code can be stored, partially or fully, on a memory device ofthe executing computing device, for execution by the computing device.Software instructions can be embedded in a firmware, such as an EPROM.It will be further appreciated that hardware modules can be included ofconnected logic units, such as gates and flip-flops, and/or can beincluded of programmable units, such as programmable gate arrays orprocessors. The modules or computing device functionality describedherein can be implemented as software modules, and can be represented inhardware or firmware. In general, the modules described herein refer tological modules that can be combined with other modules or divided intosub-modules despite their physical organization or storage. In someembodiments, the control module 260 or controllers may include signalprocessing circuity, memory circuitry, one or more processors, a singlechip microcomputer, or the like, or a combination thereof. In someembodiments, at least a portion of the control module 260 or controllersmay be integrated in one or more printed circuit boards of therespiratory ventilation apparatus 110.

The peripheral device 270 may be configured to facilitate the operationor use of the respiratory ventilation apparatus 110. In someembodiments, the peripheral device 270 may include the respiration tube160, the subject interface 170, or the like, or a combination thereof.More descriptions of the peripheral device 270 may be found elsewhere inthe present disclosure (e.g., FIG. 1 and the descriptions thereof).

It should be noted that the above description of the respiratoryventilation apparatus 110 is merely provided for the purposes ofillustration, and not intended to limit the scope of the presentdisclosure. For persons having ordinary skills in the art, multiplevariations and modifications may be made under the teachings of thepresent disclosure. However, those variations and modifications do notdepart from the scope of the present disclosure.

In some embodiments, the respiratory ventilation apparatus 110 mayinclude one or more additional modules, units, assemblies, devices, orthe like.

For example, the respiratory ventilation apparatus 110 may include astorage module configured to store data generated during the operationof the respiratory ventilation apparatus 110.

As another example, the respiratory ventilation apparatus 110 mayinclude one or more ultraviolet lamps set in one or more gas passages ofthe respiratory ventilation apparatus 110, the respiration tube 160,and/or the subject interface 170. The ultraviolet lamp(s) may beconfigured to sterilize one or more gases flowing in the respiratoryventilation apparatus 110, one or more gas passages in the respiratoryventilation apparatus 110, or one or more components of the respiratoryventilation apparatus 110 (e.g., the humidification assembly 220), orthe like.

As a further example, the respiratory ventilation apparatus 110 mayinclude one or more display panels configured to display informationrelating to the system 100.

As a further example, the respiratory ventilation apparatus 110 mayinclude a communication module configured to communicate informationwith the processing device 140, the terminal 130, etc. The communicationmodule may be connected to a network (e.g., the network 120) tofacilitate data communications. The communication module may establishconnections between the processing device 140 and the respiratoryventilation apparatus 110, the terminal 130, or the storage device 150.The connection may be a wired connection, a wireless connection, orcombination of both that enables data transmission and reception. Thewired connection may include an electrical cable, an optical cable, atelephone wire, or the like, or any combination thereof. The wirelessconnection may include Bluetooth, Wi-Fi, WiMax, WLAN, ZigBee, mobilenetwork (e.g., 3G, 4G, 5G, etc.), or the like, or a combination thereof.In some embodiments, the communication module may include a standardizedcommunication port, such as RS232, RS485, etc. In some embodiments, thecommunication module may include a specially designed communicationport.

As a further example, the respiratory ventilation apparatus 110 mayinclude a remote-control unit. The remote-control unit may be configuredto remotely operate the respiratory ventilation apparatus 110. A user(e.g., the subject 180) may operate the respiratory ventilationapparatus 110 via the remote-control unit without adjusting one or morecomponents of the respiratory ventilation apparatus 110 (e.g., theon-off key 311, the display panel 312, the knob 313, the home button314, or the like, as illustrated in FIG. 3).

In some embodiments, one or more components of the respiratoryventilation apparatus 110 may be omitted. For example, the heatingdevice 224 may be omitted and/or replaced by an ultrasonic atomizer. Asanother example, the humidification assembly 220 may be omitted. As afurther example, the gas filter component 230 may be omitted.

FIGS. 3A-3D illustrate an exemplary respiratory ventilation apparatusaccording to some embodiments of the present disclosure. FIG. 3A shows afront side of the respiratory ventilation apparatus 300. FIG. 3B shows arear side of the respiratory ventilation apparatus 300. FIG. 3C showsanother rear side of the respiratory ventilation apparatus 300. FIG. 3Dshows main components of the respiratory ventilation apparatus 300. Asillustrated in FIGS. 3A-3D, the respiratory ventilation apparatus 300may include a main body 310 and a liquid chamber 320.

As illustrated in FIG. 3A, the main body 310 of the respiratoryventilation apparatus 300 may include an on-off key 311, a display panel312, a knob 313, a home button 314, or the like. The on-off key 311 maybe configured to cause the respiratory ventilation apparatus 300 toswitch between a boot state and a shutdown state. For example, if therespiratory ventilation apparatus 300 is switched off, a user (e.g., thesubject 180) may press the on-off key 311 to boot the respiratoryventilation apparatus 300. As another example, if the respiratoryventilation apparatus 300 is switched on, the user (e.g., the subject180) may press the on-off key 311 to shut down the respiratoryventilation apparatus 300. The display panel 312 may be configured todisplay information relating to the respiratory ventilation apparatus300. The information displayed may include, for example, the parametersrelating to the respiratory gas, the expired gas of the subject 180,and/or the operation status of the respiratory ventilation apparatus110. More descriptions of the parameters may be found elsewhere in thepresent disclosure (e.g., FIG. 1 and the descriptions thereof). In someembodiments, the display panel 312 may be configured as a softwareoperation interface of the respiratory ventilation apparatus 110. Insome embodiments, the display panel 312 may be a touch panel.

The knob 313 may be configured to facilitate a user (e.g., the subject180) to adjust and/or set the value(s) of one or more parametersillustrated above and/or a menu item of software implemented in therespiratory ventilation apparatus 110. In some embodiments, the knob 313may be turned and/or pressed. For example, the subject 180 may turn theknob 313 to adjust the value(s) of the pressure of the respiratory gas,the humidity of the respiratory gas, etc. As another example, thesubject 180 may press the knob 313 to confirm an adjusted (or set)parameter, select a menu item, exit from a functional interface, etc. Asa further example, the subject 180 may long press the knob 313 (or shortpress the knob 313 two times) to access a doctor's interface. In thedoctor's interface, a doctor may be allowed to adjust and/or set one ormore parameters associated with the respiratory ventilation apparatus110. The home button 314 may be pressed to switch to a main interface ofthe software. In some embodiments, the home button 314 may be longpressed to mute the hardware and/or software of the respiratoryventilation apparatus 110. One or more of the on-off key 311, thedisplay panel 312, the knob 313, and the home button 314 may be set onthe front side, the rear side, the top side, the left side, or the rightside of the respiratory ventilation apparatus 300, the rear side of therespiratory ventilation apparatus 300.

As illustrated in FIG. 3A, the liquid chamber 320 may include a tank 322and a tank cover 321. The liquid chamber 320 may be removably coupled tothe main body 310 of the respiratory ventilation apparatus 300 (see FIG.3D). In some embodiments, the liquid chamber 320 may be in detachableconnection with the main body 310 of the respiratory ventilationapparatus 300. A user (e.g., the subject 180) may discharge the liquidchamber 320 from the respiratory ventilation apparatus 300, so thatliquid filling in the tank 322, liquid exchange of the tank 322, washingof the tank 322, and/or sterilization of the liquid chamber 320 may befacilitated. More descriptions of the liquid chamber 320 may be foundelsewhere in the present disclosure (e.g., FIGS. 18A, 18B, 23A, 26B,30A, 30B, 36A, and 36B, and the descriptions thereof). As illustrated inFIG. 3A, the liquid chamber 320 is set on the right side of the mainbody 310 for illustration purposes. It should be noted that in someembodiments, the liquid chamber 320 may be set on the left side of themain body 310.

As illustrated in FIG. 3B, the respiratory ventilation apparatus 300 mayinclude a gas inlet port 332 and a gas outlet port 331. In someembodiments, the main body 310 of the respiratory ventilation apparatus300 may include a housing. The housing may include a first side wall(e.g., the interface between the main body 310 and the liquid chamber320) and a second side wall (e.g., the rear side). The first side wallmay be configured to discharge the pressurized respiratory gas. The gasinlet port 332 may be set on the main body 310. In some embodiments, thegas inlet port 332 may be set on the second side wall of the housing ofthe main body 310 of the respiratory ventilation apparatus 300. In someembodiments, the gas inlet port 332 may be set on the front side, therear side, the top side of the respiratory ventilation apparatus 300. Insome embodiments, the gas inlet port 332 may be set on a side of therespiratory ventilation apparatus 300 opposite to the liquid chamber320. As illustrated in FIGS. 3A and 3B, as the liquid chamber 320 is seton the right side of the main body 310, the gas inlet port 332 may beset on the left side of the respiratory ventilation apparatus 300. InFIG. 3B, the gas outlet port 331 is set on the main body 310. The gasoutlet port 331 may be set on the same side of the respiratoryventilation apparatus 300 as the gas inlet port 332. In someembodiments, the gas outlet port 331 and the gas inlet port 332 may beset on different sides of the respiratory ventilation apparatus 300. Insome embodiments, the gas outlet port 331 may be set on the liquidchamber 320. In some embodiments, the respiratory ventilation apparatus300 may include or be equipped with one or more gas filter units (e.g.,a coarse filter, a fine filter, or the like) inside the gas inlet port332 to filter the respiratory gas entering the gas inlet port 332.

As illustrated in FIG. 3C, the respiratory ventilation apparatus 300 mayinclude a gas filter component 340. The gas filter component 340 may beconfigured to filter the respiratory gas entering the respiratoryventilation apparatus 300. The gas filter component 340 may be removablycoupled to the gas inlet port 332 of the respiratory ventilationapparatus 300 (see FIG. 3D). The gas filter component 340 may include acoarse filter and/or a fine filter (not shown in FIGS. 3A-3D). It shouldbe noted that the gas filter component 340 may be optional. In someembodiments, the respiratory ventilation apparatus 300 may not includethe gas filter component 340 as illustrated in FIG. 3B. As illustratedin FIG. 3D, the liquid chamber 320 and/or the gas filter component 340may be in detachable connection with the main body 310 of therespiratory ventilation apparatus 300. More descriptions of the gasfilter component 340 may be found elsewhere in the present disclosure(e.g., FIG. 6A-7B and the descriptions thereof).

As illustrated in FIG. 3C, the respiratory ventilation apparatus 300 mayinclude a first interface 350, a second interface 360, and a thirdinterface 370. The first interface 350 may be configured to supplyelectric power for the heating device 224 of the respiratory ventilationapparatus 300. The second interface 360 may be configured as aninterface for software upgrading and/or data reading (or transmission).The third interface 370 may be configured to supply electric power forthe respiratory ventilation apparatus 300.

FIG. 4 illustrates an exemplary process for delivering a respiratory gasaccording to some embodiments of the present disclosure. In someembodiments, one or more operations of process 400 illustrated in FIG. 4for delivering a respiratory gas may be implemented in the system 100illustrated in FIG. 1. For example, the process 400 illustrated in FIG.4 may be stored in the storage device 150 in the form of instructions,and invoked and/or executed by the processing device 140. As anotherexample, a portion of the process 400 may be implemented on therespiratory ventilation apparatus 110. The operations of the illustratedprocess presented below are intended to be illustrative. In someembodiments, the process may be accomplished with one or more additionaloperations not described, and/or without one or more of the operationsdiscussed. Additionally, the order in which the operations of theprocess as illustrated in FIG. 4 and described below is not intended tobe limiting.

In 410, the respiratory ventilation apparatus 110 (e.g., the controlmodule 260) may initiate one or more components of the respiratoryventilation apparatus 110. In some embodiments, the respiratoryventilation apparatus 110 may be initiated upon a boot operation (e.g.,a user presses the on-off button the respiratory ventilation apparatus110). In some embodiments, the control module 260 may load a bootstrapprogram from a storage device (e.g., a RAM, a ROM, a flash memory, asecure digital (SD) memory card, etc.) of the respiratory ventilationapparatus 110, load a user program from the storage device of therespiratory ventilation apparatus 110, initiate one or more peripheraldevices of the control module 260 (e.g., a communication interface, atimer, an AD acquisition interface, an indicator light, a button, aknob, a power switch, etc.), initiate one or more sensors, initiate thegas pressurization unit 210, initiate one or more configurationparameters, and/or initiate one or more treatment parameters. In someembodiments, the control module 260 may initiate a random access memoryof the respiratory ventilation apparatus 110, read one or moreparameters from a storage device of the main body (e.g., a non-volatilememory, a flash memory, an SD card) of the respiratory ventilationapparatus 110 and/or from the network 120, and/or initiate the detectionmodule 250. In some embodiments, the control module 260 may initiate aprogram that constantly reads information from the detection module 250,and control the pressure of the pressurized respiratory gas using atleast the information read from the detection module 250 and one or moreof the parameters. In some embodiments, the parameter(s) read from astorage device of the main body (e.g., a non-volatile memory, a flashmemory, an SD card) of the respiratory ventilation apparatus 110 and/orfrom the network 120 may include one or more thresholds relating to anupper limit of the pressure, an upper limit of an air leakage of thepressurized respiratory gas, a lower limit of the air leakage of thepressurized respiratory gas, a lower limit of a respiratory rate, or alower limit of an input voltage of the respiratory ventilation apparatus110, or the like.

In 420, the respiratory ventilation apparatus 110 may deliver arespiratory gas to a user (e.g., the subject 180). In some embodiments,the control module 260 may control or adjust the rotated speed of thegas pressurization unit 210 to pressurize the respiratory gas, and thepressurized respiratory gas may be discharged (or delivered) to thesubject 180 via one or more gas passaged in the respiratory ventilationapparatus 110, the respiration tube 160, and/or the subject interface170. In some embodiments, the control module 260 may adjust the rotatedspeed of the gas pressurization unit 210 to pressurize the respiratorygas with a delay after the initiation of the respiratory ventilationapparatus 110. In some embodiments, the delay may be preset by the user.

In 430, the respiratory ventilation apparatus 110 may detect informationrelating to the respiratory gas and/or the subject 180. In someembodiments, the control module 260 may cause the detection module 250(e.g., one or more sensors) to detect one or more parameters (e.g., apressure) of the pressurized respiratory gas. The detected informationmay include parameters relating to the respiratory gas, the expired gasof the subject 180, and/or the operation status of the respiratoryventilation apparatus 110. More descriptions of the parameters may befound elsewhere in the present disclosure (e.g., FIG. 2 and thedescriptions thereof). In some embodiments, the control module 260 maydetermine one or more parameters based on the operation condition(s) ofone or more components of the respiratory ventilation apparatus 110. Forexample, the control module 260 may determine the pressure of therespiratory gas based on the rotation speed, input voltage, and/orreal-time power of the gas pressurization unit 210. In some embodiments,the control module 260 may adjust the rotation speed of the gaspressurization unit 210 to maintain the detected pressure of thepressurized respiratory gas within a predetermined range.

In 440, the respiratory ventilation apparatus 110 may determine whetheran abnormal condition is recognized. In some embodiments, the controlmodule 260 may recognize an abnormal condition based on a comparisonbetween a current state of the respiratory ventilation apparatus 110 andthe plurality of parameters read from a storage device of the main bodyof the respiratory ventilation apparatus 110 and/or from the network120. In some embodiments, the current state of the respiratoryventilation apparatus 110 may include for example, the pressure of therespiratory gas, an air leakage of the pressurized respiratory gas, arespiratory rate, an input voltage of the gas pressurization unit 210,etc. In response to a determination that an abnormal condition isrecognized, the process 400 may proceed to 450. In response to adetermination that no abnormal condition is recognized, the process 400may return to 420, i.e., the respiratory ventilation apparatus 110 maycontinue delivering the respiratory gas.

In 450, the respiratory ventilation apparatus 110 may provide an alertor reminder to a user (e.g., the subject 180). The alert or reminder mayinclude a voice, a text, etc. For example, in response to an abnormalcondition, the respiratory ventilation apparatus 110 may make an alarmsound, the respiratory ventilation apparatus 110 may display a notice ona displayer, and/or the control module 260 may send an instruction tothe terminal 130 to display a notice or make an alarm sound, etc. Insome embodiments, after the respiratory ventilation apparatus 110provides an alert or reminder to the user, the process may return to420, i.e., the respiratory ventilation apparatus 110 may continuedelivering the respiratory gas.

FIGS. 5A-5E illustrate exemplary gas passages of a respiratoryventilation apparatus according to some embodiments of the presentdisclosure. As illustrated in FIG. 5A, a flow of respiratory gas (e.g.,ambient gas) may flow from a gas inlet port 332 into the respiratoryventilation apparatus 300 and out of the respiratory ventilationapparatus 300 from the gas outlet port 331. In some embodiments, therespiratory ventilation apparatus 300 may further include a gas filtercomponent 340 mounted outside the gas inlet port 332. The respiratorygas may be filtered by the gas filter component 340 before entering therespiratory ventilation apparatus 300 via the gas inlet port 332. Asillustrated in FIG. 5B, a side of the main body 310 attached with theliquid chamber 320 may include an outlet port 501 and an inlet port 502.The respiratory gas filtered by the gas filter component 340 may bepressurized by the gas pressurization unit 210 and then pass through theoutlet port 501 of the main body 310. As illustrated in FIG. 5C, theliquid chamber 320 may include the tank 322 and the tank cover 321, anda side of the tank cover 321 attached with the main body 310 may includean outlet port 503 and an inlet port 504. The filtered and pressurizedrespiratory gas passing through the outlet port 501 of the main body 310may enter the liquid chamber 320 from the inlet port 504 of the tankcover 321 and be humidified in the tank 322. The outlet port 503 of thetank cover 321 may output the pressurized and humidified respiratorygas. As illustrated in FIGS. 5D and 5E, the pressurized and humidifiedrespiratory gas output by the outlet port 503 of the tank cover 321 mayreturn to the main body 310 from the inlet port 502 of the main body 310and flow out of the respiratory ventilation apparatus 300 from the gasoutlet port 331 of the respiratory ventilation apparatus 300.

It should be noted that the above description of the respiratoryventilation apparatus 300 is merely provided for the purposes ofillustration, and not intended to limit the scope of the presentdisclosure. For persons having ordinary skills in the art, multiplevariations and modifications may be made under the teachings of thepresent disclosure. However, those variations and modifications do notdepart from the scope of the present disclosure. In some embodiments,the respiratory ventilation apparatus 300 may not include thehumidification assembly 220 (i.e., the liquid chamber 320 may beomitted). In some embodiments, the gas outlet port 331 of therespiratory ventilation apparatus 300 may be set on the liquid chamber320, and accordingly, the inlet port 502 of the respiratory ventilationapparatus 300 and the outlet port 503 of the liquid chamber 320 may beomitted. That is, the pressurized respiratory gas may be introduced intothe liquid chamber 320 via the outlet port 501 of the main body 310 andthe inlet port 504 of the liquid chamber 320, and then be discharged toa respiration tube via a gas outlet port set on the liquid chamber 320.Correspondingly, the humidified respiratory gas may not flow back to themain body 310.

FIGS. 6A-6E illustrate an exemplary gas filter component according tosome embodiments of the present disclosure. FIG. 6A shows a firstaxonometric drawing of the gas filter component 600 illustrating a frontside, a left side, and a top side of the gas filter component 600. FIG.6B shows a first exploded view of the gas filter component 600. FIG. 6Cshows an internal structure of a housing of the gas filter component600. FIG. 6D shows a second exploded view of the gas filter component600. FIG. 6E shows a second axonometric drawing of the gas filtercomponent 600 illustrating a rear side, a left side, and a top side ofthe gas filter component 600. In some embodiments, the gas filtercomponent 600 may be in detachable connection with the gas inlet port112 of the respiratory ventilation apparatus 110.

The gas filter component 600 may include a housing 601 and one or moregas filter units (e.g., a first gas filter unit 605, a second gas filterunit 606, etc.). In some embodiments, a respiratory gas (e.g., anambient gas) may enter the respiratory ventilation apparatus 300 (e.g.,when the gas pressurization unit 210 is in operation) via the gas filtercomponent 600 along a direction indicated by the arrow shown in FIG. 6A.The gas filter component 600 (e.g., the first gas filter unit 605, thesecond gas filter unit 606, etc.) may filter the respiratory gasentering the respiratory ventilation apparatus 300. In some embodiments,the one or more gas filter units may filter the respiratory gas indifferent levels.

The housing 601 may include a gas inlet end 602 and a gas outlet end609. The gas inlet end 602 may include a first cover plate 604. The gasoutlet end 609 may include a second cover plate 607. In someembodiments, the first cover plate 604 may have a same size as the gasinlet end 602. In some embodiments, the first cover plate 604 mayinclude at least one hole allowing the respiratory gas to enter the gasfilter component 600. In some embodiments, the second cover plate 607may have a smaller size than the gas outlet end 609. In someembodiments, the second cover plate 607 may include at least one holeallowing the respiratory gas to exit the gas filter component 600 andenter the respiratory ventilation apparatus 300. In some embodiments,the first cover plate 604 may be in detachable connection with thehousing 601. In some embodiments, the first cover plate 604 may includea frame. In some embodiments, the frame of the first cover plate 604 mayinclude one or more holes or grooves, and the housing 601 may includeone or more corresponding protruding structures (or vice versa), so thatthe first cover plate 604 may be connected with the housing 601. In someembodiments, the second cover plate 607 may be fixed on the gas outletend 609 of the housing 601 through a sealed connection. In someembodiments, the second cover plate 607 and the housing 601 may beconfigured as an integral piece. In some embodiments, the first coverplate 604 and/or the second cover plate 607 may be configured to preventone or more gas filter units (e.g., the first gas filter unit 605 and/orthe second gas filter unit 606) of the gas filter component 600 fromdeformation. In some embodiments, the housing 601 of the gas filtercomponent 600 may be configured to facilitate the disassembly of the gasfilter component 600, and/or facilitate the replacement of the gasfilter unit(s) (e.g., the first gas filter unit 605 and/or the secondgas filter unit 606) of the gas filter component 600.

In some embodiments, the gas filter component 600 may have a stepped ortapered three-dimensional structure. In some embodiments, the gas filtercomponent 600 may have the shape of a cuboid. In some embodiments, thegas filter component 600 may have the shape of a funnel. In someembodiments, the gas outlet end 609 of the housing 601 may have theshape of a funnel. In some embodiments, the gas inlet end 602 may have asame size as the gas outlet end 609. In some embodiments, the gas inletend 602 may have a larger size than the gas outlet end 609, so that theintake volume of the respiratory gas flowing into the gas filtercomponent 600 can be increased. In some embodiments, the gas outlet end609 may have the shape of a funnel, so that the gas outlet end 609 canbe connected with the gas inlet port 112 of the respiratory ventilationapparatus 110. In some embodiments, a cross section (perpendicular tothe inflow direction of the respiratory gas) of the gas inlet end 602(or the first cover plate 604) of the gas filter component 600 may belarger than that of the gas outlet end 609 (or the second cover plate607), which means the gas inlet end 602 (or the first cover plate 604)may have a larger intake area than the gas outlet end 609 (or the secondcover plate 607).

In some embodiments, the first cover plate 604 (or the gas inlet end602) and the second cover plate 607 (or the gas outlet end 609) may havethe same shape. In some embodiments, the first cover plate 604 (or thegas inlet end 602) and the second cover plate 607 (or the gas outlet end609) may have different shapes. For example, the first cover plate 604and the second cover plate 607 may have a shape of a rounded rectangle.As another example, the first cover plate 604 and the second cover plate607 may have a shape of a circle. As still another example, the firstcover plate 604 may have a shape of a rounded rectangle, while thesecond cover plate 607 may have a shape of a circle. As still anotherexample, the first cover plate 604 may have a shape of a circle, whilethe second cover plate 607 may have a shape of a rounded rectangle.

The first cover plate 604 may include a plurality of holes. The holes ofthe first cover plate 604 may be configured to facilitate therespiratory gas to flow through the first cover plate 604 and reach thegas filter unit(s) to be filtered. After flowing through the pluralityof holes of the first cover plate 604, the respiratory gas may befiltered by the gas filter unit(s). Then the filtered respiratory gasmay flow through the second cover plate 607 and enter the gas inlet port112 of the respiratory ventilation apparatus 110. The second cover plate607 may include one or more holes. The holes of the second cover plate607 may be configured to facilitate the filtered respiratory gas to flowthrough the second cover plate 607 and reach the gas inlet port 112. Insome embodiments, the number of the holes set on the first cover plate604 may be larger than the number of the holes set on the second coverplate 607.

In some embodiments, the holes of the first cover plate 604 and/or thesecond cover plate 607 may have a shape of a strip, circle, rectangle,triangle, rhombus, hexagon, star-like, or the like, or any combinethereof. The holes may have a relatively small size so that a finger ofa user cannot be put in. In some embodiments, the holes of the firstcover plate 604 and/or the second cover plate 607 may be evenlydistributed. As show in FIG. 6A, 198 round holes are evenly distributedon the first cover plate 604 to form an array of 11 rows and 18 columns.As show in FIG. 6E, 16 round holes are evenly distributed on the secondcover plate 607 to form an array of 4 rows and 4 columns. It should benoted that in some embodiments, the holes of the first cover plate 604and/or the second cover plate 607 may be unevenly distributed. In someembodiments, the holes of the first cover plate 604 and/or the secondcover plate 607 may help to adjust the gas flow of the respiratory gasentering the gas inlet port 112 of the respiratory ventilation apparatus110, so that the noise generated by the gas flow may be reduced.

In some embodiments, the first gas filter unit 605 may be a coarsefilter. In some embodiments, the coarse filter may be positioned closeto the first cover plate 604. The coarse filter may include a coarsefilter sponge (also refer to coarse filter foam). In some embodiments,the first gas filter unit 605 may include one or more layers of coarsefilter sponge (or a multilayer filtration membrane). The coarse filtersponge may be configured to filter or adsorb solid particulates (such asdust, stive, pollen, etc.) in the respiratory gas entering the gasfilter component 600. In some embodiments, the size of the particulatesfiltered by the coarse filter sponge may be larger than 5 micrometers.In some embodiments, the coarse filter may further include a fixing partconfigured to fix the coarse filter sponge in the housing 601.

In some embodiments, the second gas filter unit 606 may be a finefilter. The fine filter may include a fine filter sponge (also refer tofine filter foam). In some embodiments, the second gas filter unit 606may include one or more layers of fine filter sponge (or a multilayerultrafiltration membrane). The fine filter sponge may be configured tofilter or adsorb solid particulates with a size larger than 1micrometer, such as PM2.5 particles. Exemplary components of the coarsefilter sponge and/or the fine filter sponge may include syntheticfibers, polyester fibers, glass fibers, or the like, or any combinationthereof. In some embodiments, the fine filter may further include afixing part configured to fix the fine filter sponge in the housing 601.In some embodiments, the housing 601 may include one or more framesconfigured to fix the first gas filter unit 605 and/or the second gasfilter unit 606. In some embodiments, the first gas filter unit 605 maybe positioned closer to the first cover plate 604 than the second gasfilter unit 606 (i.e., the distance between the first gas filter unit605 and the first cover plate 604 may be less than the distance betweenthe second gas filter unit 606 and the first cover plate 604).

In some embodiments, the second gas filter unit 606 may be mountedbehind the first gas filter unit 605 in the gas flow direction. In someembodiments, the respiratory gas may flow through the first gas filterunit 605 first and then flow through the second gas filter unit 606. Insome embodiments, one or more grilles may be set between the first gasfilter unit 605 and the second gas filter unit 606, so that there may bea certain distance between the first gas filter unit 605 and the secondgas filter unit 606, thereby facilitating the respiratory gas to flowthrough the first gas filter unit 605 and the second gas filter unit606, and enhancing the filtering effect of the first gas filter unit 605and the second gas filter unit 606. In some embodiments, the first gasfilter unit 605 and the second gas filter unit 606 may be independentlymounded in the housing 601. In some embodiments, the replacement cycleof the first gas filter unit 605 may be less than the replacement cycleof the second gas filter unit 606. In some embodiments, the first gasfilter unit 605 and the second gas filter unit 606 may be detachablyconnected with the housing 601. The detachable connection may includesnap connection, screw connection, hinge connection, or the like, or anycombine thereof.

In some embodiments, the housing 601 of the gas filter component 600 mayfurther include a connection part configured to connect the gas filtercomponent 600 with the gas inlet port 112 of the respiratory ventilationapparatus 110. As shown in FIG. 6E, the connection part may include aposition claw 608 on the rear side of the housing 601 and a snap claw603 on the left side (or the right side) of the housing 601. By pressingand/or holding the snap claw 603, a user (e.g., the subject 180) mayeasily connect (or disconnect) the gas filter component 600 with (orfrom) the respiratory ventilation apparatus 110. Accordingly, a pair oflimitation holes 704 (see FIG. 7B) may be set at two sides of the gasinlet port 112 to cooperate with the snap claw 603 and the snap claw 603respectively, so that the gas filter component 600 can be fixed on therespiratory ventilation apparatus 110.

For ensuring a sealed connection between the gas filter component 600and the respiratory ventilation apparatus 110, a sealing element (e.g.,a silicone gasket) may be set between the gas outlet end 609 and the gasinlet port 112 of the respiratory ventilation apparatus 110. Forexample, a sealing element may be set at the gas outlet end 609. Asanother example, a sealing element may be set at the gas inlet port 112of the respiratory ventilation apparatus 110 (see 706 in FIG. 7B).

In some embodiments, the gas filter component 600 may further include afirst baffle (not shown). In some embodiments, the first baffle may havean area less than the gas inlet end 602 of the housing 601. In someembodiments, the first baffle may be mounted in the housing 601 closerto the gas inlet end 602 than the gas filter unit(s). In someembodiments, the coarse filter may be positioned closer to the gas inletend 602 of the housing 601 than the fine filter. For example, the firstbaffle may be mounted between the first cover plate 604 and the firstgas filter unit 605. In some embodiments, the first baffle may cause therespiratory gas to flow from one or more sides (e.g., four sides) of thefirst baffle into the gas filter component 600, so that the noisegenerated by the gas flowing may be reduced.

In some embodiments, the gas filter component 600 may be set between thegas outlet port of the respiratory ventilation apparatus 300 and therespiration tube 160. In some embodiments, the gas outlet end 609 mayhave the shape of a funnel, so that the gas outlet end 609 can beconnected with the respiration tube 160.

It should be noted that in some embodiments, the gas filter component600 may be configured as protruding out of the shell of the respiratoryventilation apparatus 110. In some embodiments, there may be a certaindistance between the first gas filter unit 605 and the second gas filterunit 606. In some embodiments, the gas filter component 600 may beequipped with one or more grilles between the first gas filter unit 605and the second gas filter unit 606. In some embodiments, the first gasfilter unit 605 may be set on the first cover plate 604. In someembodiments, the second gas filter unit 606 may be set on the secondcover plate 607. In some embodiments, both the first gas filter unit 605and the second gas filter unit 606 may be set on the first cover plate604. In some embodiments, both the first gas filter unit 605 and thesecond gas filter unit 606 may be set on the second cover plate 607. Insome embodiments, the number of the holes set on the first cover plate604 may be larger than the number of the holes set on the second coverplate 607.

FIGS. 7A and 7B illustrate an exemplary gas filter unit according tosome embodiments of the present disclosure. FIG. 7A shows an axonometricdrawing of the respiratory ventilation apparatus 300 (without thehumidification assembly 220) illustrating a rear side of the respiratoryventilation apparatus 300. FIG. 7B shows an exploded view of therespiratory ventilation apparatus 300.

The respiratory ventilation apparatus 300 may include a third gas filterunit 702. In some embodiments, the third gas filter unit 702 may be setat the gas inlet port 701 of the respiratory ventilation apparatus 300.In some embodiments, the third gas filter unit 702 may be configured tofilter the respiratory gas (e.g., ambient gas) entering the gas inletport 701. The third gas filter unit 702 may include a coarse filterand/or a fine filter. More descriptions of the coarse filter and/or thefine filter may be found elsewhere in the present disclosure (e.g.,FIGS. 6A-6E and the descriptions thereof). In some embodiments, thethird gas filter unit 702 may be mounted inside the gas inlet port ofthe respiratory ventilation apparatus 300, between the gas inlet port ofthe respiratory ventilation apparatus 300 and a gas inlet port of thegas pressurization unit 210, at the gas inlet port of the gaspressurization unit 210, at a gas outlet port of the gas pressurizationunit 210, between the gas outlet port of the gas pressurization unit 210and the gas outlet port of the respiratory ventilation apparatus 300, atthe gas outlet port of the respiratory ventilation apparatus 300, in therespiration tube 160, and/or in the subject interface 170. For example,the third gas filter unit 702 may be set between the gas outlet port ofthe respiratory ventilation apparatus 300 and the respiration tube 160.

In some embodiments, the gas inlet port 701 may include or be equippedwith a second baffle 705 and/or a third baffle 703. In some embodiments,one or more limitation holes 704 may be set at one or more sides of thegas inlet port 701. The limitation hole(s) 704 may be configured tofacilitate the fixation of an additional gas filter component (e.g., thegas filter component 600 shown in FIGS. 6A-6E). The second baffle 705and the third baffle 703 may be configured to fix the third gas filterunit 702 at the gas inlet port 701. In some embodiments, the third gasfilter unit 702 may be fixed between the second baffle 705 and the thirdbaffle 703. The second baffle 705 may include a plurality of holes, sothat the respiratory gas can flow through the second baffle 705. Theholes may have various shapes. For example, as shown in FIG. 7B, theholes may have a shape of a strip. It should be noted that in someembodiments, if an additional gas filter component (e.g., the gas filtercomponent 600 shown in FIGS. 6A-6E) is in use, the second baffle 705 maybe discharged from the gas inlet port 701. If the additional gas filtercomponent is not in use, the second baffle 705 may be mounted at the gasinlet port 701, and the second baffle 705 may cover the limitationhole(s) 704. In some embodiments, the third baffle 703 may be a crossbaffle. The third baffle 703 may include a plurality of protrusionsconfigured to support the third gas filter unit 702. In someembodiments, the edge 706 of the gas inlet port 701 may include or beequipped with a sealing element, so as to form a sealing connectionbetween the additional gas filter component and the gas inlet port 701.

In some embodiments, the respiratory ventilation apparatus 300 mayinclude a fourth gas filter unit. The fourth gas filter unit may beconfigured to filter one or more gases with pungent smell and/or one ormore harmful gases (e.g., methanol) in one or more gas passages of therespiratory ventilation apparatus 300. In some embodiments, the fourthgas filter unit may include a membrane manufactured by one or morenanomaterials having adsorption ability. The one or more nanomaterialsmay include activated carbon, graphene, graphene oxide, carbon nanotube,or the like, or any combine thereof. The one or more nanomaterials mayhave large specific surface area. A large specific surface area mayindicate a large number of surface atoms. Surface atoms may be morereactive than inner layer atoms and may be more likely to adsorb gasmolecules. Therefore, a larger specific surface area of a nanomaterialmay indicate a stronger adsorption ability.

If the respiratory ventilation apparatus 300 is used by a patient in ahospital, the pungent smell may be a smell of hospital disinfectant. Ifthe respiratory ventilation apparatus 300 is used by a user at home, thepungent smell may be a smell of smoking and/or cooking fume. In someembodiments, the fourth gas filter unit may be mounted outside the gasinlet port of the respiratory ventilation apparatus 300, at the gasinlet port of the respiratory ventilation apparatus 300, inside the gasinlet port of the respiratory ventilation apparatus 300, between the gasinlet port of the respiratory ventilation apparatus 300 and a gas inletport of the gas pressurization unit 210, at the gas inlet port of thegas pressurization unit 210, at a gas outlet port of the gaspressurization unit 210, between the gas outlet port of the gaspressurization unit 210 and the gas outlet port of the respiratoryventilation apparatus 300, at the gas outlet port of the respiratoryventilation apparatus 300, in the respiration tube 160, and/or in thesubject interface 170. For example, the fourth gas filter unit may beset between the gas outlet port of the respiratory ventilation apparatus300 and the respiration tube 160.

In some embodiments, the respiratory ventilation apparatus 300 mayinclude a fifth gas filter unit. The fifth gas filter unit may beconfigured to filter bacteria in one or more gases in one or more gaspassages of the respiratory ventilation apparatus 300. In someembodiments, after long-term use, a large amount of bacteria may bepropagated in the respiratory ventilation apparatus 300. The fifth gasfilter unit may include a membrane to filter bacteria. The membrane mayuse one or more physical or chemical techniques to realize bacteriafiltration. The physical or chemical techniques may include highefficiency particulate air filter (HEPA) with H13 grade or above, plasmasterilizing technology, photo catalyst sterilizing technology (e.g.,titanium dioxide as the catalyst for base material, CH-CUT technologywith CH-CUT nanomaterial as the core, etc.), semiconductor catalyticsterilization technology, or the like, or any combine of thereof. Insome embodiments, the fifth gas filter unit may be mounted outside thegas inlet port of the respiratory ventilation apparatus 300, at the gasinlet port of the respiratory ventilation apparatus 300, inside the gasinlet port of the respiratory ventilation apparatus 300, between the gasinlet port of the respiratory ventilation apparatus 300 and a gas inletport of the gas pressurization unit 210, at the gas inlet port of thegas pressurization unit 210, at a gas outlet port of the gaspressurization unit 210, between the gas outlet port of the gaspressurization unit 210 and the gas outlet port of the respiratoryventilation apparatus 300, at the gas outlet port of the respiratoryventilation apparatus 300, in the respiration tube 160, and/or in thesubject interface 170. For example, the fifth gas filter unit may be setbetween the gas outlet port of the respiratory ventilation apparatus 300and the respiration tube 160. In some embodiments, considering moist gasmay be more suitable for bacteria breeding, the fifth gas filter unitmay be mounted in a gas passage between the liquid chamber 222 and thegas outlet port of the respiratory ventilation apparatus 300. In someembodiments, the respiratory ventilation apparatus 300 may include oneor more gas filter units (e.g. the third gas filter unit, the fourth gasfilter unit, the fifth gas filter unit, etc.) mounted in the respirationtube 160 and/or the subject interface 170.

It should be noted that in some embodiments, the filter sponges of oneor more of the first gas filter unit, the second filter unit, the thirdfilter unit, the fourth gas filter unit, and the fifth gas filter unit,may have different materials, different shapes, and/or different colors.In some embodiments, to facilitate the replacement of the filterunit(s), the first gas filter unit, the second filter unit, the thirdfilter unit, the fourth gas filter unit, and/or the fifth gas filterunit may be mounted at a connection position of two components of therespiratory ventilation apparatus 300 (e.g., a connection positionbetween the main body of the respiratory ventilation apparatus 300 andthe liquid chamber, a connection position between the gas outlet port ofthe respiratory ventilation apparatus 300 and the respiration tube 160,a connection position between the respiration tube 160 and the subjectinterface 170, etc.). In some embodiments, the filter unit(s) may bedischarged from the respiratory ventilation apparatus 300 and may bestored under appropriate conditions (e.g., a drying closet, asterilizer, a storage box, a dust-proof box, etc.).

In some embodiments, an ultrasonic atomizer may be used in thehumidification assembly 220, and droplets of one or more therapeuticdrugs and/or one or more liquids may be generated and introduced intothe respiratory gas. In some embodiments, one or more filter unitsillustrated above may be used to filter harmful particulates in thedroplets of therapeutic drugs and/or liquids, and/or the respiratorygas. In some embodiments, the filter sponges of the filter unit(s) mayinclude a hydrophobic surface.

FIGS. 8A-8D illustrate different views of an exemplary noise reductionassembly according to some embodiments of the present disclosure. FIG.8A shows an axonometric drawing of the noise reduction assembly 8. FIG.8B shows a bottom surface of the noise reduction assembly 8. FIG. 8Cshows an internal structure of the noise reduction assembly 8 with soundabsorbing materials. FIG. 8D shows an internal structure of the noisereduction assembly 8 without sound absorbing materials. The noisereduction assembly 8 may be configured to reduce noise generated by agas pressurization unit 808 and/or the noise generated by the flowing ofthe (pressurized) respiratory gas in the gas passage(s) of therespiratory ventilation apparatus 110. The noise reduction assembly 8may include a noise reduction box 801, one or more sound absorbingmaterials, and/or one or more frames.

In some embodiments, the noise reduction box 801 may be a sealed boxwith a gas inlet port 809 (e.g., a gas inlet port for introducingrespiratory gas into the noise reduction box 801) and a gas outlet port810 (e.g., a gas outlet port for outputting (pressurized) respiratorygas). In some embodiments, the gas inlet port 809 of the noise reductionbox 801 may be in a sealed connection with an inner side of the gasinlet port 112 of the respiratory ventilation apparatus 110, so that therespiratory gas entering the gas inlet port 112 of the respiratoryventilation apparatus 110 may directly flow into the noise reduction box801. In some embodiments, the gas inlet port 809 of the noise reductionbox 801 may be configured as the gas inlet port 112 of the respiratoryventilation apparatus 110.

The noise reduction box 801 may accommodate the gas pressurization unit808. The gas pressurization unit 808 may include a blower (not shown)configured to generate a flow of pressurized respiratory gas based onthe gas introduced in the respiratory ventilation apparatus 110. In someembodiments, after being filtered by one or more gas filter unitsmounted inside the gas inlet port, the respiratory gas may enter the gaspressurization unit 808 and be pressurized by the blower, andpressurized respiratory gas may be generated. The pressurizedrespiratory gas may be discharged from the noise reduction box 801 to aninner gas passage of the respiratory ventilation apparatus 110 via thegas outlet port 810.

In some embodiments, the noise reduction box 801 may include one or moresound absorbing materials (e.g. an L-type sound absorbing material 804,a broken line type sound absorbing material 802, a rectangular soundabsorbing material 803). The sound absorbing materials may be set on theinner walls of the noise reduction box 801. As shown in FIG. 8C, theL-type sound absorbing material 804 and the broken line type soundabsorbing material 802 may be set close to the gas inlet port 809. Arectangular sound absorbing material 803 may be set close to the gaspressurization unit 808.

In some embodiments, the one or more sound absorbing materials mayinclude porous materials, panel materials, resonance materials, or thelike, or any combine thereof. Exemplary porous materials may includecarpet, draperies, spray-applied cellulose, aerated plaster, fibrousmineral wool and glass fiber, open-cell foam, felted or cast porousceiling tile, or the like, or a combination thereof. In someembodiments, porous materials may be the most commonly used soundabsorbing materials. In some embodiments, the thickness of the porousmaterials may be important in sound absorption. The sound-absorbingeffect of the porous materials may stem from the fact that the soundenergy may penetrate the porous materials when hitting the surface ofthe porous materials. In some embodiments, the sound energy may beconverted into heat energy, so that only a relatively small part may bereflected in the form of sound energy. In other words, the porousmaterial may absorb a portion of the sound. In some embodiments, panelmaterials may be non-rigid, non-porous materials. The panel materialsmay be placed over an airspace that vibrates in a flexural mode inresponse to sound pressure exerted by adjacent gas molecules. Exemplarypanel (or membrane) materials may include thin wood. In someembodiments, panel materials may be configured to absorb low-frequencynoises. Resonance materials may be configured to absorb sound in arelatively narrow frequency range. Resonance materials may include someperforated materials and materials that have openings (holes and slots).An exemplary resonance material may include the Helmholtz resonancematerial, which may have a shape of a bottle. The resonant frequency maybe governed by the size of the opening, the length of the neck, and thevolume of gas trapped in the bottle-shaped chamber.

In some embodiments, the noise reduction box 801 may further include oneor more frames configured to fix the one or more sound absorbingmaterials. In some embodiments, the size and/or shape of the frame(s)and that of the corresponding sound absorbing materials may be matched.As shown in FIG. 8D, a frame 805 and a frame 806 may be configured tofix the L-type sound absorbing material 804 and the broken line typesound absorbing material 802 on the inner walls of noise reduction box801, respectively. A frame 807 may be configured to fix the rectangularsound absorbing material 803. It should be noted that not all of thesound absorbing materials and the frames are shown in FIGS. 8C and 8D.For the purpose of illustration, only three sound absorbing materialsand their corresponding frames are described in the preset disclosure,but not intended to limit the scope of the present disclosure.

As shown in FIGS. 8C and 8D, the one or more sound absorbing materialsand/or the one or more frames may form a gas passage with one or moretwists and/or one or more turns in the noise reduction box 801. The gaspassage in the noise reduction box 801 may be divided into a pluralityof sub gas passages with different cross sections. The noise generatedby the blower may constantly collide with the sound absorbing materials,resulting in that the vibration energy may be continuously absorbedwhich and the noise may be effectively reduced in decibels. In someembodiments, the sub gas passages may form at least two damping spacesincluding a first damping space close to the gas inlet port 809 and asecond damping space around the gas pressurization unit 808. The firstdamping space and the second damping space may be connected by a sub gaspassage between them. In some embodiments, the at least two dampingspace may provide a greater area for the respiratory gas than the subgas passage connecting them, and then a relatively low resistance of therespiratory gas may be achieved at a relatively high velocity.Therefore, the noise (especially high frequency components of the noise)generated by the flowing of the respiratory gas may be effectivelyreduced.

FIGS. 9A-9E illustrate an exemplary connection between a noise reductionassembly and a main body of a respiratory ventilation apparatusaccording to some embodiments of the present disclosure. In someembodiments, the noise reduction box 801 may be fixed between a shellcover 901 of the respiratory ventilation apparatus 110 and a baseplate902 of the respiratory ventilation apparatus 110. In some embodiments,the noise reduction box 801 may include one or more protrudingstructures and/or one or more grooves. In some embodiments, the shellcover 901 and/or the baseplate 902 may including one or morecorresponding grooves and/or one or more corresponding protrudingstructures configured to cooperate with the protruding structure(s)and/or the groove(s), so that the noise reduction box 801 may be fixedbetween the shell cover 901 and the baseplate 902.

FIGS. 10A-10C illustrate exemplary exploded views of a noise reductionassembly according to some embodiments of the present disclosure. Thenoise reduction box 801 may include a box cover 1001, a box body 1003,and a filling part 1002. The noise reduction box 801 may accommodate thegas pressurization unit 808. In some embodiments, the filling part 1002may be set around the gas pressurization unit 808. The filling part 1002may include a plurality of sound absorbing materials configured toreduce noise generated in the noise reduction box 801. The gaspressurization unit 808 may include a gas inlet port (not shown in FIGS.10A-10C) and a gas outlet port 1004. The gas inlet port of the gaspressurization unit 808 may be configured to introduce respiratory gasfrom the noise reduction box 801 into the gas pressurization unit 808.The gas outlet port 1004 may be configured to discharge the pressurizedrespiratory gas from the gas pressurization unit 808 to the gas passagesof the main body of the respiratory ventilation apparatus 110.

FIGS. 11A-11F illustrate an exemplary connection between a gaspressurization unit and a noise reduction box according to someembodiments of the present disclosure. In some embodiments, the noisereduction box 801 may further include one or more supports (e.g., threesupports) 1102 configured to support the gas pressurization unit 808 inan inner space of the box body 1003 of the noise reduction box 801 (seeFIGS. 11E and 11F). In some embodiments, the box body 1003 of the noisereduction box 801 may include one or more corresponding limitation holes1104 configured to limit the position of the supports 1102. In someembodiments, each of the supports 1102 may include a support portion anda buffer portion. The support portion of each of the supports 1102 maybe manufactured by a hard material to fix the gas pressurization unit808 in the noise reduction box 801. The buffer portion of each of thesupports 1102 may be manufactured by flexible material (e.g. silicone)to damp the vibration of the gas pressurization unit 808 to reducenoise.

In some embodiments, the gas pressurization unit 808 may include a gasinlet port 1103 configured to introduce respiratory gas from the noisereduction box 801 into the gas pressurization unit 808. In someembodiments, the gas pressurization unit 808 may include a connectingpiece 1101 configured to fix the gas pressurization unit to an internalspace of the noise reduction box 801. In some embodiments, the box body1003 of the noise reduction box 801 may include a limitation groove1105. The connecting piece 1101 may be fixed in the limitation groove1105 so that the gas pressurization unit 808 may be fixed in theinternal space of the noise reduction box 801 (see FIGS. 11E and 11F).In some embodiments, the connecting piece 1101 may damp vibration of thegas pressurization unit 808 in one or more directions. More descriptionsof the connecting piece 1101 may be found elsewhere in the presentdisclosure (e.g., FIGS. 13A and 13B, and the descriptions thereof).

FIGS. 12A-12C illustrate an exemplary gas pressurization unit accordingto some embodiments of the present disclosure. As shown in FIG. 12A, thegas pressurization unit 808 may include a connecting piece 1101 and oneor more supports 1102. The connecting piece 1101 may be configured tofix the gas pressurization unit 808 to an internal space of the mainbody of the respiratory ventilation apparatus 110. In some embodiments,the connecting piece 1101 may be configured to damp the vibration and/orimpede the transmission of vibration of the gas pressurization unit 808(e.g., to the noise reduction box 801) in one or more directions. Thevibration of the gas pressurization unit 808 may be generated intransportation, operation, etc. In some embodiments, the connectingpiece 1101 may be detachably connected with the gas outlet port 1004 ofthe gas pressurization unit 808.

FIG. 12B shows a side cross-sectional view of the connecting piece 1101coupled to the blower according to some embodiments of the presentdisclosure. In some embodiments, the gas outlet port 1004 of the gaspressurization unit 808 may be connected to the connecting piece 1101 byone or more screw threads. In some embodiments, the gas outlet port 1004of the gas pressurization unit 808 may be connected to the connectingpiece 1101 by one or more protruding bumps and one or more correspondinggrooves. In some embodiments, an inner surface of the gas outlet port1004 may be connected to an outer surface of the connecting piece 1101.In some embodiments, as shown in FIG. 12B, an inner surface of theconnecting piece 1101 may be connected to an outer surface of the gasoutlet port 1004. Merely by way of example, as shown in FIG. 12C, twoannular grooves in the inner surface of the connecting piece 1101 may becoupled to two annular protrusions on the outer surface of the gasoutlet port 1004 of the gas pressurization unit 808. In someembodiments, the connecting piece 1101 may be manufactured by or includea flexible material (e.g. silicone) with elasticity. In someembodiments, the gas outlet port 1004 of the gas pressurization unit 808may be directly inserted into the connecting piece 1101 or may bepivoted relative to the gas pressurization unit 808, such that the gasoutlet port 1004 can be connected to the connecting piece 1101.

FIGS. 13A and 13B illustrate an exemplary connecting piece according tosome embodiments of the present disclosure. FIG. 13A shows anaxonometric drawing of the connecting piece 1101. FIG. 13B shows a sidecross-sectional view of the connecting piece 1101. As shown in FIGS. 13Aand 13B, the connecting piece 1101 may include a connecting part 1301and a fixing part 1302. The connecting part 1301 and the fixing part1302 may be made of the same or different materials. In someembodiments, the connecting part 1301 may be configured to connect withthe gas outlet port 1004 (see FIG. 12B) of the gas pressurization unit808 and/or form a sealed connection between the connecting piece 1101and the gas pressurization unit 808. In some embodiments, to prevent thegas outlet port 1004 of the gas pressurization unit 808 from separatingfrom the connecting part 1301, the connecting part 1301 may be made ofone or more flexible materials (e.g., silicone), so that the connectingpiece 1101 may tolerate or damp vibration of the gas pressurization unit808 induced by rough handling of the respiratory ventilation apparatus110.

In some embodiments, the fixing part 1302 may be configured to fix theconnecting piece 1101 to the internal space of the main body of therespiratory ventilation apparatus 110 and/or form a fastening connectionbetween the connecting piece 1101 and the main body of the respiratoryventilation apparatus 110. In some embodiments, the fixing part 1302 maybe configured to fix the connecting piece 1101 to a noise reduction box(e.g., the noise reduction box 801 shown in FIG. 8B) and/or form afastening connection between the connecting piece 1101 and the noisereduction box. As shown in FIG. 11B, the noise reduction box 801 mayinclude one or more limitation grooves 1105 (e.g., fixing slot(s))coupled to the fixing part 1302 of the connecting piece 1101. In someembodiments, by sticking two opposite sides of the fixing part 1302 intothe fixing slot(s), the gas pressurization unit 808 may be fixed in afixed position inside the noise reduction box 801.

In some embodiments, the fixing part 1302 may be made of one or morehard materials, such as Teflon, a thermoplastic polymer with relativelyhigh strength and/or toughness. In some embodiments, as shown in FIG.13A, the fixing part 1302 may have a sheet structure. In someembodiments, the fixing part 1302 may include an aperture configured toallow the (pressurized) respiratory gas to pass. In some embodiments,the connecting part 1301 may have a tubular structure. The tubularstructure may include a first end 1303 and a second end 1304. In someembodiments, the first end 1303 of the connecting part 1301 may be fixedto the fixing part 1302. In some embodiments, the second end 1304 of theconnecting part 1301 may be connected to the outlet port of the gaspressurization unit 808. The connecting part 1301 may be capable ofallowing the (pressurized) respiratory gas to pass through the tubularstructure to the aperture of the fixing part 1302. In some embodiments,the (pressurized) respiratory gas may be discharged from the gaspressurization unit 808 and successively flow through the gas outletport 1004, the connecting part 1301, the aperture of the fixing part1302, the gas outlet port 810 of the noise reduction box 801, and intoan inner gas passage of the respiratory ventilation apparatus 110.

In some embodiments, the connecting part 1301 may include one or moreannular structures. The one or more annular structures may be connectedend to end. In some embodiments, there may be a certain distance betweeneach two adjacent annular structures of the one or more annularstructures. In some embodiments, each of the one or more annularstructures may include an outer annular structure and inner annularstructure. The outer annular structure(s) may be connected with thefixing part 1302. The inner annular structures may be connected with thenoise reduction box, fix the connecting piece 1101 to the noisereduction box, and/or form a fastening connection between the connectingpiece 1101 and the noise reduction box.

In some embodiments, as shown in FIG. 13B, the connecting part 1301 andthe fixing part 1302 may be configured as an integral piece. In someembodiments, the second end 1304 of the connecting part 1301 may have anannular double-layer structure including an inner layer 1305 and anouter layer 1306. In some embodiments, the second end 1304 of theconnecting part 1301 may have an annular multi-layer structure includingan inner layer 1305, an outer layer 1306, and one or more intermediatelayers (not shown in FIG. 13B).

In some embodiments, as shown in FIG. 13B, the outer layer 1306 mayconnect with the fixing part 1302 of the connecting piece 1101 in oneend and may connect with the inner layer 1305 in the other end. In someembodiments, the inner layer 1305 may not connect with the fixing part1302. In some embodiments, the inner layer 1305 may be connected to anouter surface of the gas outlet port 1004 of the gas pressurization unit808. In some embodiments, the outer surface of the gas outlet port 1004of the gas pressurization unit 808 may include one or more protrudingbumps, and the inner surface of the inner layer 1305 may include one ormore corresponding grooves to match with the one or more protrudingbumps, so that the gas outlet port 1004 of the gas pressurization unit808 can be fixed to the connecting piece 1101. In some embodiments, theouter surface of the gas outlet port 1004 of the gas pressurization unit808 may include one or more grooves, and the inner surface of the innerlayer 1305 may include one or more corresponding protruding bumps tomatch with the one or more grooves, so that the gas outlet port 1004 ofthe gas pressurization unit 808 can be fixed to the connecting piece1101. The protruding bumps and/or the grooves may have various shapes(e.g., cuboid, cube, cylinder, cone, truncated cone, prism, pyramid,truncated pyramid, or the like, or any combine thereof). Merely by wayof example, as shown in FIG. 13B, the protruding bumps and thecorresponding grooves may be annular. In some embodiments, theprotruding bumps and/or the corresponding grooves may be uniformlyarranged. Alternatively or additionally, the protruding bumps and/or thecorresponding grooves may be disorderly arranged. In some embodiments,the outer layer 1306 may include a first annular flexible structure 1307configured to tolerate or damp vibration of the gas pressurization unit808 along an axial direction of the connecting part 1301. In someembodiments, the first annular flexible structure 1307 may have a Ushape, a V shape, a Z shape, an M shape, an S shape, a C shape, an Oshape, or the like, or a combination thereof. In some embodiments, thefirst annular flexible structure 1307 may have one or more folds.

In some embodiments, the inner layer 1305 may connect with the fixingpart 1302 of the connecting piece 1101 in one end and may connect withthe outer layer 1306 in the other end. In some embodiments, the outerlayer 1306 may not connect with the fixing part 1302. In someembodiments, the outer layer 1306 may be connected to an inner surfaceof the gas outlet port 1004 of the gas pressurization unit 808. In someembodiments, the inner surface of the gas outlet port 1004 of the gaspressurization unit 808 may include one or more grooves, and the outersurface of the outer layer 1306 may include one or more correspondingprotruding bumps to match with the one or more grooves, so that the gasoutlet port 1004 of the gas pressurization unit 808 can be fixed to theconnecting piece 1101. In some embodiments, the inner surface of the gasoutlet port 1004 of the gas pressurization unit 808 may include one ormore protruding bumps, and the outer surface of the outer layer 1306 mayinclude one or more corresponding grooves to match with the one or moreprotruding bumps, so that the gas outlet port 1004 of the gaspressurization unit 808 can be fixed to the connecting piece 1101. Theprotruding bumps and/or the grooves may have various shapes (e.g.,cuboid, cube, cylinder, cone, truncated cone, prism, pyramid, truncatedpyramid, or the like, or any combine thereof). Merely by way of example,as shown in FIG. 13B, the protruding bumps and the corresponding groovesmay be annular. In some embodiments, the protruding bumps and/or thecorresponding grooves may be uniformly arranged. Alternatively oradditionally, the protruding bumps and/or the corresponding grooves maybe disorderly arranged. In some embodiments, the inner layer 1305 mayinclude a first annular flexible structure configured to tolerate ordamp vibration of the gas pressurization unit 808 along an axialdirection of the connecting part 1301. In some embodiments, the firstannular flexible structure may have a U shape, a V shape, a Z shape, anM shape, an S shape, a C shape, an O shape, or the like, or acombination thereof. In some embodiments, the first annular flexiblestructure may have one or more folds.

In some embodiments, a joint of the inner layer 1305 and the outer layer1306 may include a second annular flexible structure 1308 configured totolerate or damp vibration of the gas pressurization unit 808 along aradial direction of the connecting part 1301. In some embodiments, thesecond annular flexible structure 1308 may have a U shape, a V shape, aZ shape, an M shape, an S shape, a C shape, an O shape, or the like, orany combine of thereof. In some embodiments, the second annular flexiblestructure 1308 may have one or more folds.

In some embodiments, if the second end 1304 of the connecting part 1301has an annular multi-layer structure including an inner layer 1305, anouter layer 1306, and one or more intermediate layers, the one or moreintermediate layers may include a first annular flexible structureconfigured to tolerate or damp vibration of the gas pressurization unit808 along an axial direction of the connecting part 1301. In someembodiments, the first annular flexible structure may have a U shape, aV shape, a Z shape, an M shape, an S shape, a C shape, an O shape, orthe like, or any combine of thereof. In some embodiments, the firstannular flexible structure may have one or more folds. In someembodiments, a joint of the inner layer 1305 and an intermediate layer,a joint of the outer layer 1306 and an intermediate layers, and/or ajoint of two intermediate layers may include one or more second annularflexible structures configured to tolerate or damp vibration of the gaspressurization unit 808 along a radial direction of the connecting part1301. In some embodiments, each second annular flexible structure mayhave a U shape, a V shape, a Z shape, an M shape, an S shape, a C shape,an O shape, or the like, or any combine of thereof. In some embodiments,each second annular flexible structure may have one or more folds.

It should be noted that the above description is merely provided for thepurposes of illustration, and not intended to limit the scope of thepresent disclosure. For persons having ordinary skills in the art,multiple variations and modifications may be made under the teachings ofthe present disclosure. However, those variations and modifications donot depart from the scope of the present disclosure. In someembodiments, the number of the first annular flexible structure may belarger than one. In some embodiments, the number of the second annularflexible structure may be larger than one. In some embodiments, thefirst annular flexible structure, the second annular flexible structure,the inner layer 1305, and/or the outer layer 1306 may be made of thesame or different materials. For example, the first annular flexiblestructure and/or the second annular flexible structure may be made ofmaterial(s) with relatively high elasticity (e.g., flexiblematerial(s)), while the inner layer 1305 and/or the outer layer 1306 maybe made of material(s) with relatively low elasticity (e.g., hardmaterial(s)). In some embodiments, the first annular flexible structure,the second annular flexible structure, the inner layer 1305, and/or theouter layer 1306 may have the same or different thicknesses. Forexample, the first annular flexible structure and/or the second annularflexible structure may have relatively small thickness, while the innerlayer 1305 and/or the outer layer 1306 may have relatively largethickness. In some embodiments, the first annular flexible structure,the second annular flexible structure, the inner layer 1305, and/or theouter layer 1306 may be partially strengthened by one or more fibers. Insome embodiments, the connecting piece 1101 may be manufactured base on3D printing. In some embodiments, the structure of the connecting part1301 may be applied in various connecting pieces of the respiratoryventilation apparatus 110, including for example, the connecting piecebetween the gas outlet port 111 and the respiration tube 160, theconnecting piece between the main body of the respiratory ventilationapparatus 110 and a liquid chamber, the connecting piece between therespiration tube 160 and the subject interface 170, etc.

FIGS. 14A and 14B illustrate an exemplary respiratory ventilationapparatus including a gas parameter detection assembly according to someembodiments of the present disclosure. The gas parameter detectionassembly may be configured to detect one or more gas parameters of(pressurized and/or humidified) respiratory gas e.g., from the downstream of the humidification assembly 220. In some embodiments, theparameter(s) detected by the gas parameter detection may include a snoreof a user (e.g., the subject 180) of the respiratory ventilationapparatus 110. FIG. 14A shows an axonometric drawing of the main body1400 of the respiratory ventilation apparatus 110 including the gasparameter detection assembly. FIG. 14B shows a cross-section view of therespiratory ventilation apparatus 110 including the gas parameterdetection assembly. In some embodiments, as shown in FIGS. 14A and 14B,the gas parameter detection assembly may include an acquisition part1401. The acquisition part 1401 may be configured to acquire a gas flow.In some embodiments, the acquisition part 1401 may be placed in adownstream of the humidified and pressurized respiratory gas relative tothe humidification assembly 220. In some embodiments, the gas flow maybe disturbed by a snore of a user (e.g., the subject 180) of therespiratory ventilation apparatus 110. In some embodiments, a main bodyof the respiratory ventilation apparatus 110 may include a gas returnchamber 1404. The gas return chamber 1404 may be connected with the gasoutlet port 1402 of the respiratory ventilation apparatus 110. In thepresent disclosure, the gas outlet port 1402 of the respiratoryventilation apparatus 110 may also be referred to as the main gas outletport of the respiratory ventilation apparatus 110. The gas returnchamber 1404 may be configured to guide the (pressurized and humidified)respiratory gas to flow to the gas outlet port 1402. In someembodiments, the acquisition part 1401 may be set in the gas returnchamber 1404. In some embodiments, the acquisition part 1401 may be setfacing the gas outlet port 1402 of the respiratory ventilation apparatus110. In some embodiments, the acquisition part 1401 may be in adetachable connection with the respiratory ventilation apparatus 110. Insome embodiments, the acquisition part 1401 may be fixed to therespiratory ventilation apparatus 110 via one or more slots (e.g., twoslots) set on one or more sides of the acquisition part 1401 (see FIG.16B).

In some embodiments, as shown in FIGS. 14A, 14B, and 16A-16D, theacquisition part 1401 may include an input port 1601, an output port1602, and/or at least one channel 1403 (also referred as a gas passage).In some embodiments, the channel 1403 may be a curved channel. In someembodiments, the channel 1403 may be set inside the acquisition part1401. In some embodiments, a first end of the channel 1403 may be theinput port 1601. In some embodiments, the input port 1601 may be openingon a first surface (e.g. a front surface) of the acquisition part 1401.In some embodiments, the first surface may face the gas outlet port 1402of the respiratory ventilation apparatus 110. In some embodiments, asecond end of the channel 1403 may be the output port 1602. In someembodiments, the output port 1602 may be opening on a second surface(e.g. a bottom surface) of the acquisition part 1401. In someembodiments, the second surface may be different from the first surface.In some embodiments, the second surface of the acquisition part 1401 maybe in a sealed connection with an inner surface of the main body of therespiratory ventilation apparatus 110 (e.g., a bottom surface of the gasreturn chamber 1404). In some embodiments, the input port 1601 may beset above the bottom surface of the gas return chamber 1404. In someembodiments, the input port 1601 may be set above the second surface ofthe acquisition part 1401. In some embodiments, the acquisition part1401 may be protruding from the inner surface of the main body of therespiratory ventilation apparatus 110 (e.g., a bottom surface of the gasreturn chamber 1404), to prevent water from flowing in the acquisitionpart 1401. In some embodiments, the cross-sectional area of the channel1403 may be gradually increasing from the input port 1601 to the outputport 1602. In some embodiments, one or more ports (e.g., a first port1501, a second port 1502) may be set in the inner space of the apparatusbeneath the output port 1602 of the acquisition part 1401. In someembodiments, the gas flow may be introduced into the inner space of therespiratory ventilation apparatus 110 via the acquisition part 1401 andthe one or more ports. In some embodiments, the acquisition part 1401may be made of a flexible material (e.g., silicone) or a hard material.In some embodiments, the acquisition part 1401 may be made of ahydrophobic material.

FIGS. 15A and 15B illustrate an inner space of an exemplary respiratoryventilation apparatus including a gas parameter detection assemblyaccording to some embodiments of the present disclosure. In someembodiments, a printed circuit board (PCB) may be mounted in the innerspace of the respiratory ventilation apparatus 110. In some embodiments,one or more sensors (e.g., a first sensor 1504, a second sensor 1505)may be integrated into the PCB. FIG. 15A shows a bottom view of theinner space of the respiratory ventilation apparatus 110. FIG. 15B showsa magnified view of the one or more sensors integrated into the printedcircuit board (PCB) mounted in the inner space of the respiratoryventilation apparatus 110. As shown in FIGS. 15A and 15B, the gasparameter detection assembly may include a first sensor 1504. In someembodiments, the first sensor 1504 may be configured to measure a gasparameter associated with the snore based on the gas flow. In someembodiments, the first sensor 1504 may be configured to measure apressure of the gas flow. In some embodiments, the first sensor 1504 mayinclude a third port 1506 on its surface. In some embodiments, the thirdport 1506 may be integrally formed on the surface of the first sensor1504. In some embodiments, the first sensor 1504 may be a pressuresensor. In some embodiments, the gas parameter detection assembly mayinclude a first tube (not shown). The first tube may connect the firstport 1501 with the third port 1506. The first tube may be configured tointroduce the gas flow from the acquisition part 1401 to the surface ofthe first sensor 1504.

In some embodiments, the first sensor 1504 (e.g., pressure sensor) maybe further configured to detect the pressure of the respiratory gas inone or more gas passages of the respiratory ventilation apparatus 110.In some embodiments, the pressure of the respiratory gas in the gaspassage(s) of the respiratory ventilation apparatus 110 may be detectedbased on a low-frequency part of the signal detected by the first sensor1504, while a snoring signal may be detected based on a high-frequencypart of the signal detected by the first sensor 1504. In someembodiments, the control module 260 may control and/or adjust therotation speed of the gas pressurization unit 210 to achieve a desiredpressure of the respiratory gas based on the detected pressure of therespiratory gas.

In some embodiments, the respiratory ventilation apparatus 110 mayinclude a flow detection assembly. The flow detection assembly may beconfigured to detect a flux of one or more gases in one or more passagesof the respiratory ventilation apparatus 110. In some embodiments, thefirst sensor and the second sensor may share a same acquisition part1401. In some embodiments, the flow detection assembly may include thesecond sensor 1505. The second sensor 1505 may be configured to detect aflux signal associated with the one or more gases in the one or morepassages of the respiratory ventilation apparatus 110. In someembodiments, the second sensor 1505 may be a flow sensor. In someembodiments, the second sensor 1505 may include a fourth port 1507and/or a fifth port 1508 on its surface. In some embodiments, the fourthport 1507 and/or the fifth port 1508 may be integrally formed on thesurface of the second sensor 1505. In some embodiments, the flowdetection assembly may include a sixth port 1503 (also referred to as anauxiliary acquisition port). The sixth port 1503 may be set in the mainbody of the respiratory ventilation apparatus 110. In some embodiments,the sixth port 1503 may be set at upstream of the one or more gases thatflow to the acquisition part 1401. In some embodiments, the sixth port1503 may be configured to acquire a gas flow from the gas outlet port ofthe gas pressurization unit 210. In some embodiments, the flow detectionassembly may include a second tube (not shown) and/or a third tube (notshown). The second tube may be configured to introduce a gas flow fromthe acquisition part 1401 to a surface of the second sensor 1505. Insome embodiments, the second tube may connect the second port 1502 withthe fourth port 1507 to introduce the gas flow from the acquisition part1401 to the surface of the second sensor 1505. The third tube may beconfigured to introduce a gas flow from the auxiliary acquisition portto a surface of the second sensor 1505. In some embodiments, the thirdtube may connect the fifth port 1508 with the sixth port 1503 tointroduce the gas flow from the auxiliary acquisition port to thesurface of the second sensor 1505.

FIGS. 16A-16D illustrate an exemplary acquisition part of a gasparameter detection assembly and/or a flow detection assembly accordingto some embodiments of the present disclosure. The acquisition part 1401may be set in the main body of the respiratory ventilation apparatus 110facing the gas outlet port 1402 of the respiratory ventilation apparatus110. In some embodiments, the acquisition part 1401 may acquire thepressurized and humidified respiratory gas from the down stream of thehumidification assembly 220. Therefore, the gas flow acquired by theacquisition part 1401 may be more stable, and the parameter(s) (such as,snore, pressure, flow rate, or the like) detected may be more accurate.FIG. 16A shows a perspective view of the acquisition part 1401 accordingto some embodiments of the present disclosure. In some embodiments, asshown in FIG. 16A, the acquisition part 1401 may have an approximaterounded cuboid structure with six surfaces (e.g. a front surface, a backsurface, a top surface, a bottom surface, a left surface, and a rightsurface). The front surface of the acquisition part 1401 may face thegas outlet port 1402 of the respiratory ventilation apparatus 110. Insome embodiments, the acquisition part 1401 may have another structureincluding a cuboid, a cube, a cylinder, a prism, or the like, or anycombine thereof.

In some embodiments, the acquisition part 1401 may include an input port1601. In some embodiments, the input port 1601 may be set at the frontsurface of the acquisition part 1401 facing the gas outlet port 1402 ofthe respiratory ventilation apparatus 110. In some embodiments, theinput port 1601 may be set below an upper edge of the gas outlet port1402 of the respiratory ventilation apparatus 110 but above a lower edgeof the gas outlet port 1402. In some embodiments, the input port 1601may be set at the upper left corner of the front surface. In someembodiments, the input port 1601 may be set on another position of thefront surface. For example, the input port 1601 may be set on the upperright corner or the center of the front surface. In some embodiments,the input port 1601 may set on another surface of the acquisition part1401, such as the top surface of the acquisition part 1401. In someembodiments, the input port 1601 may have a shape of a long and thinrounded rectangle (or a strip). In some embodiments, the input port 1601may have another shape including a square, a circle, a polygon, or thelike, or any combine of thereof. In some embodiments, the input port1601 may have one or more openings.

FIG. 16B shows a side perspective view of the acquisition part 1401according to some embodiments of the present disclosure. In someembodiments, as shown in FIG. 16B, the acquisition part 1401 may includeone or more slots. The one or more slots may be configured to establisha detachable connection between the acquisition part 1401 and the mainbody of the respiratory ventilation apparatus 110. In some embodiments,the one or more slots may include a first fixing slot 1607 and a secondfixing slot 1603. The first fixing slot 1607 and the second fixing slot1603 may be set on the same or different surfaces of the acquisitionpart 1401. For example, the first fixing slot 1607 may be set on thefront surface of the acquisition part 1401, while the second fixing slot1603 may be set on the back surface of the acquisition part 1401. Insome embodiments, the first fixing slot 1607 and the second fixing slot1603 may be set parallel to fix the acquisition part 1401 in thehorizontal direction. In some embodiments, the first fixing slot 1607and the second fixing slot 1603 may be set on the right surface and leftsurface, respectively. In some embodiments, the first fixing slot 1607and the second fixing slot 1603 may be set closer to the bottom surfaceof the acquisition part 1401. In some embodiments, the acquisition part1401 may include a first groove 1605 and a second groove 1606 set on anysurface of the acquisition part 1401 (e.g., the right surface).

In some embodiments, one or more claws may be set on the bottom surfaceof the acquisition part 1401. Correspondingly, one or more slots coupledto the one or more claws may be set in the main body of the respiratoryventilation apparatus 110 to fix the acquisition part 1401. In someembodiments, one or more slots may be set on the bottom surface of theacquisition part 1401, and one or more claws coupled to the one or moreslots may be set in the main body of the respiratory ventilationapparatus 110 to fix the acquisition part 1401.

FIG. 16C shows a bottom perspective view of the acquisition part 1401according to some embodiments of the present disclosure. As shown inFIG. 16C, the acquisition part 1401 may include an output port 1602. Insome embodiments, as shown in FIG. 16C, the output port 1602 may be seton the bottom surface of the acquisition part 1401. In some embodiments,the output port 1602 may be set on another surface of the acquisitionpart 1401, for example, the back surface of the acquisition part 1401.The output port 1602 may be set below the input port 1601. In someembodiments, the output port 1602 may have a shape of a roundedrectangle. In some embodiments, the output port 1602 may have a shape ofa square, a circle, a polygon, or the like, or any combine of thereof.In some embodiments, a silicone gasket 1604 may be set on theacquisition part 1401 to ensure a sealed connection between theacquisition part 1401 and the main body of the respiratory ventilationapparatus 110. In some embodiments, the silicone gasket 1604 may be setaround the output port 1602. In some embodiments, the output port 1602may be set closer to the upper edge of the silicone gasket 1604.

FIG. 16D shows a side cross-sectional view of the acquisition part 1401according to some embodiments of the present disclosure. As shown inFIG. 16D, the acquisition part 1401 may include a channel 1403. Thechannel 1403 may be set inside the acquisition part 1401. The channel1403 may be configured to connect the input port 1601 and the outputport 1602. In some embodiments, the channel 1403 may have a relativelysmall area of cross section near the input port 1601 and a relativelylarge area of cross section near the output port 1602. In someembodiments, from the input port 1601 to the output port 1602, thecross-sectional area of the channel 1403 may increase gradually. In someembodiments, the pressurized respiratory gas may include a certainamount of moisture. In some embodiments, one or more water droplets maybe generated near the input port 1601 because of the condensation of thewater vapor in the pressurized respiratory gas. In some embodiments, toprevent the condensate water droplets from flowing from the input port1601 and the channel 1403 onto the surface of the first sensor 1504, thechannel 1403 may include a droop near the input port 1601, so that theinput port 1601 may be below the top of the channel 1403. Therefore, thecondensate water droplets may be prevented from flowing back through thechannel 1403 to the surface of the first sensor under the force ofgravity.

In some embodiments, the respiratory ventilation apparatus 110 mayinclude a pressure sensor (e.g., the first sensor 1504) and a flowsensor (e.g., the second sensor 1505) for snore detection, and ahumidified gas inlet port (e.g., the input port 1601) configured tointroduce pressurized and humidified respiratory gas from thehumidification assembly 220. In some embodiments, the pressure sensorand the flow sensor may be connected via a (curved) channel (e.g., thechannel 1403) to a section between a main gas outlet port of therespiratory ventilation apparatus 110 (e.g., the gas outlet port 1402)and the humidified gas inlet port.

FIG. 17 illustrates an exemplary respiratory ventilation apparatusaccording to some embodiments of the present disclosure. The respiratoryventilation apparatus 1700 may include a main body 1702, and/or ahumidification assembly. In some embodiments, the humidificationassembly may be configured to humidify the pressurized respiratory gasto generate pressurized and humidified respiratory gas. In someembodiments, the humidification assembly may include a liquid chamber1704, a heater plate 1710, and a heat-conducting plate 1810 (see FIGS.18A and 18B). The liquid chamber 1704 may be configured to accommodateone or more liquids (e.g., water and/or drug). The heat-conducting platemay be configured to conduct heat from the heater plate 1710 to heat theone or more liquids and generate vapor to humidify the pressurizedrespiratory gas. In some embodiments, the heat-conducting plate may beset on the bottom of the liquid chamber 1704. In some embodiments, theheat-conducting plate may include a metallic heat conducting material.

In some embodiments, the main body 1702 may include a gas pressurizationunit (not shown in FIG. 17) located in the main body 1702, a gas inletport 1706, a gas outlet port 1708, and/or a support plate 1707. In someembodiments, the gas inlet port 1706 and/or the gas outlet port 1708 maybe set on a first interface of the main body 1702 and the liquid chamber1704. In some embodiments, the support plate 1707 may be set on a secondinterface of the main body 1702 and the liquid chamber 1704. In someembodiments, the support plate 1707 may be fixed to a base plate of themain body 1702. In some embodiments, the first interface (see FIGS.23A-23D) of the main body 1702 and the liquid chamber 1704 may refer toa side surface of the main body 1702 and a corresponding side surface ofthe liquid chamber 1704. In some embodiments, the second interface (seeFIGS. 17-21D) of the main body 1702 and the liquid chamber 1704 mayrefer to a bottom surface of the liquid chamber 1704 and a correspondingsurface of the support plate 1707 of the main body 1702. In someembodiments, the gas outlet port 1708 may be configured to discharge thepressurized respiratory gas from the main body 1702 to the liquidchamber 1704. In some embodiments, the gas inlet port 1706 may beconfigured to introduce the pressurized and humidified respiratory gasfrom the liquid chamber 1704 back into the main body 1702. In someembodiments, the support plate 1707 may include a first hole 1709 and/ora second hole 1711. In some embodiments, the first hole 1709 and/or thesecond hole 1711 may be set on the second interface. In someembodiments, at least a portion of the heater plate 1710 may be set inthe second hole 1711.

The heater plate 1710 may be configured to heat one or more liquids inthe liquid chamber 1704 and/or generate vapor to humidify thepressurized respiratory gas. In some embodiments, the heater plate 1710may be mounted on the base of the main body 1702 through one or moresprings 2202 (see FIG. 22C). The heater plate 1710 may be capable ofmoving up and down through the second hole 1711 upon being driven by apressure or upon releasing the pressure.

In some embodiments, the liquid chamber 1704 may be in detachableconnection with the main body 1702, such that the humidificationassembly may be removably coupled to the main body 1702. For example,the liquid chamber 1704 may be in detachable connection with the mainbody 1702 through a push-push mechanism (see FIGS. 19-21D) via a hole(e.g., the first hole 1709) of the support plate 1707. If the liquidchamber 1704 is mounted on the main body 1702 of the respiratoryventilation apparatus 1700, the bottom of the liquid chamber 1704 (e.g.,a heat-conducting plate of the liquid chamber 1704) may be in closecontact with the heater plate 1710. More descriptions of thehumidification assembly may be found elsewhere in the present disclosure(e.g., FIGS. 18A and 18B and the descriptions thereof).

FIGS. 18A and 18B illustrate exploded views of an exemplary liquidchamber according to some embodiments of the present disclosure. In someembodiments, as shown in FIGS. 18A and 18B, the liquid chamber 1704 mayinclude a tank cover and a tank. In some embodiments, the tank cover mayinclude a cover shell 1802 and one or more gas passages 1805. In someembodiments, the tank may include a tank shell 1808, a heat-conductingplate sealing gasket 1809, and a heat-conducting plate 1810. It shouldbe noted that in some embodiments, the gas passage(s) 1805 may be set inthe tank. In some embodiments, the liquid chamber 1704 may include afixing gasket 1806 and/or a tank cover sealing gasket 1807 between thetank and the tank cover. The fixing gasket 1806 and/or the tank coversealing gasket 1807 may be configured to enable a sealed connectionbetween the tank and the tank cover. In some embodiments, the liquidchamber 1704 may include a connecting plate 1803 and/or a gas passagesealing gasket 1804 to cooperate with the main body 1702.

In some embodiments, the components of the liquid chamber 1704 may be indetachable connection. For example, the connecting plate 1803 may be seton and/or fixed to the cover shell 1802 by cementing, riveting,joggling, clamping, meshing, or the like, or any combination thereof. Asanother example, the gas passage sealing gasket 1804 may be connectedand/or fixed to the gas passage(s) 1805. As another example, the fixinggasket 1806 and/or the tank cover sealing gasket 1807 may be set onand/or fixed to the tank shell 1808 to improve air tightness between thecover shell 1802 and the tank shell 1808. In some embodiments, thefixing gasket 1806 may be set inside the tank cover sealing gasket 1807.As a further example, the heat-conducting plate sealing gasket 1809 maybe set between the heat-conducting plate 1810 and a bottom frame of thetank shell 1808. As still a further example, the heat-conducting plate1810 may be connected with the heat-conducting plate sealing gasket 1809by cementing, riveting, joggling, clamping, meshing, or the like, or anycombination thereof. As still a further example, the heat-conductingplate sealing gasket 1809 may be fixed to the bottom frame of the tankshell 1808 by cementing, riveting, joggling, clamping, meshing, or thelike, or any combination thereof.

FIG. 19 illustrates an exemplary push-push mechanism in connection witha liquid chamber of a respiratory ventilation apparatus according tosome embodiments of the present disclosure. In some embodiments, thepush-push mechanism 1904 may be set underneath the support plate 1707.In some embodiments, the tank shell 1808 of the liquid chamber 1704 maybe in a detachable connection with the push-push mechanism 1904 by apushrod 1906. In some embodiments, the pushrod 1906 may be set below abottom surface of the liquid chamber 1704.

In some embodiments, the liquid chamber 1704 may be driven by a firstpushing force. When the first pushing force is released, the pushrod1906 may be locked with the push-push mechanism 1904, such that theliquid chamber 1704 can be mounted on the main body 1702 of therespiratory ventilation apparatus 1700. If the liquid chamber 1704 isdriven by a second pushing force and when the second pushing force isreleased, the pushrod 1906 may be removed from the push-push mechanism1904, such that the liquid chamber 1704 can be released from the mainbody 1702 of the respiratory ventilation apparatus 1700. In someembodiments, the direction of the first pushing force may be the same asthe direction of the second pushing force. For example, the direction ofthe first pushing force and the direction of the second pushing forcemay be vertically downward. In some embodiments, the push-push mechanism1904 may be set on a side of the first interface between the main body1702 and the liquid chamber 1704, and then, the first pushing force andthe second pushing force may be in the horizontal direction.

FIGS. 20A and 20B illustrate an exemplary push-push mechanism accordingto some embodiments of the present disclosure. FIG. 20A shows anaxonometric drawing of the push-push mechanism 1904. FIG. 20B shows anexploded view of the push-push mechanism 1904. In some embodiments, asshown in FIGS. 20A and 20B, the push-push mechanism 1904 may include aguide slot 2002, a slide block 2004, a first spring 2006, a secondspring 2008, a pushrod 1906 (see FIG. 19), etc.

The guide slot 2002 may be configured to accommodate the first spring2006 and the second spring 2008, and guide the moving of the slide block2004. In some embodiments, the guide slot 2002 may be set on the mainbody (e.g., the main body 1702) of a respiratory ventilation apparatus1700. For example, the guide slot 2002 may be set beneath the supportplate 1707 of the main body (e.g., the main body 1702) of therespiratory ventilation apparatus 1700. In some embodiments, the guideslot 2002 may be fixed to the main body (e.g., the main body 1702) bycementing, riveting, joggling, clamping, meshing, or the like, or anycombination thereof. In some embodiments, the guide slot 2002 may bemade of a material such as cast iron, stainless steel, nonferrous metal,plastic, or the like, or any combination thereof.

The slide block 2004 may be mounted on the guide slot 2002. In someembodiments, the slide block 2004 may move along the guide slot 2002 ina first direction back and forth. In some embodiments, the firstdirection may be parallel to the guide slot C0402. In some embodiments,the slide block 2004 may include a guide block 2005. The guide block2005 may be configured to guide or limit a moving position of thepushrod 1906. In some embodiments, as shown in FIGS. 20A and 20B, theguide block 2005 may has a frame similar to character A. In someembodiments, the guide block 2005 may include a frame different from thecharacter A (e.g., a frame of character N or M, etc.). In someembodiments, the guide block 2005 may include a first slope 2015, agroove 2035, a second slope 2025, and a third slope 2055. In someembodiments, the third slope 2055 may be substantially vertical. In someembodiments, the inclined direction of the first slope 2015 may bedifferent from the inclined direction of the second slope 2025. In someembodiments, a first angle between the first slope 2015 and a verticaldirection may be greater than a second angle between the second slope2025 and the vertical direction. The first slope 2015, the second slope2025, and/or the third slope 2055 may be configured to guide the movingposition of the pushrod 1906. The groove 2035 may be configured to limitthe moving position of the pushrod 1906. In some embodiments, the guideblock 2005 may include a first protrusion 2065, a second protrusion2075, and/or a third protrusion 2085. The first protrusion 2065 and/orthe second protrusion 2075 may be configured to prevent the pushrod 1906from moving out of the groove 2035 when the liquid chamber 1704 ismounted on the main body 1702, such that the liquid chamber 1704 can befixed to the main body 1702. In some embodiments, the first protrusion2065 and/or the second protrusion 2075 may be sharp. In someembodiments, the bottom end of the first protrusion 2065 may be lowerthan that of the second protrusion 2075. In some embodiments, the firstprotrusion 2065 and the second protrusion 2075 may be set on the sameside of the third protrusion 2085 in the horizontal direction.

In some embodiments, the slide block 2004 may further include a bulge2045 (or bump) below the groove 2035 of the guide block 2005. The bulge2045 may include a first slope and a second slope. The first slope ofthe bulge 2045 may be close to the first slope of the guide block 2005.The second slope of the bulge 2045 may be close to the second slope ofthe guide block 2005. In some embodiments, the groove 2035 may limit themoving position of the pushrod 1906 through cooperating with the bulge2045. In some embodiments, the slide block 2004 may be made of amaterial such as cast iron, stainless steel, nonferrous metal, plastic,or the like, or any combination thereof. In some embodiments, thematerial of the slide block 2004 may be the same as or different fromthe material of the guide slot 2002.

The first spring 2006 and the second spring 2008 may be set in the guideslot 2002. The first spring 2006 may include a first end and a secondend. The first end of the first spring 2006 may be connected to a firstend of the guide block 2005. The second end of the first spring 2006 maybe fixed to the main body (e.g., the main body 1702) of the respiratoryventilation apparatus 1700. The second spring 2008 may include a firstend and a second end. The first end of the second spring 2008 may beconnected to a second end of the guide block 2005. The second end of thesecond spring 2008 may be fixed to the main body (e.g., the main body1702) of the Respiratory ventilation apparatus. In some embodiments, thefirst spring 2006 may be the same as or different from the second spring2008, for example, in materials (e.g., carbon steels, or alloy steels),types (e.g., coil springs, wave springs, shaped springs, or conicalsprings), sizes, or the like, or any combination thereof.

In some embodiments, the first spring 2006 and the second spring 2008may be configured to guide a moving direction of the guide block 2005(or slide block 2004). In some embodiments, if the guide block 2005 (orslide block 2004) is driven to move along the first direction (e.g., thedirection indicated by the solid arrow in FIG. 20B), the second spring2008 may be compressed. The compressed second spring 2008 may be capableof driving the guide block 2005 (or slide block 2004) to move along anopposite direction of the first direction (e.g., the direction indicatedby the dotted arrow in FIG. 20B). Additionally or alternatively, if theguide block 2005 (or slide block 2004) is driven to move along theopposite direction of the first direction, the first spring 2006 may becompressed. The compressed first spring 2006 may be capable of drivingthe guide block 2005 (or slide block 2004) to move along the firstdirection. In some embodiments, the first spring 2006 may be omitted.

In some embodiments, the pushrod 1906 may include a first end and asecond end. The first end of the pushrod 1906 may be mounted on theliquid chamber 1704 (e.g., the tank shell 1808). The second end of thepushrod 1906 may cooperate with the guide block 2005. In someembodiments, the pushrod 1906 may be movable along a second directionback and forth. In some embodiments, the second direction may beperpendicular to the first direction of the movement of the guide block2005 (or slide block 2004). In some embodiments, the second end of thepushrod 1906 may include a fixed structure such as a bulge (e.g., acylinder). In some embodiments, the second end of the pushrod 1906 mayinclude a rotatable structure such as a bearing assembly. In someembodiments, the second end of the pushrod 1906 including a fixedstructure may be capable of sliding along the first slope 2015, thethird slope 2055, the groove 2035, and the second slope 2025 of theguide block 2005. In some embodiments, the second end of the pushrod1906 including a rotatable structure may be capable of rolling along thefirst slope 2015, the third slope 2055, the groove 2035, and the secondslope 2025 of the guide block 2005.

FIGS. 21A and 21B illustrate an exemplary process for mounting a liquidchamber on a main body of a respiratory ventilation apparatus by apush-push mechanism according to some embodiments of the presentdisclosure. As shown in FIG. 21A, the liquid chamber 1704 may be drivenby a first pushing force and then be mounted on the main body 1702. Insome embodiments, the first pushing force may be generated by a user(e.g., the subject 180). The direction of the first pushing force may beindicated by the arrow A (e.g., a vertical direction, also referred toas the second direction). In some embodiments, the pushrod 1906 may becapable of passing through the first hole 1709 and interact with theguide block 2005. In some embodiments, the center position of thepushrod 1906 may be on the right side of the bottom of the secondprotrusion 2075 along the first direction in its natural state. Uponbeing driven by the first pushing force, the pushrod 1906 may move withthe liquid chamber 1704 along the second direction (indicated by thearrow A) and slide down along the first slope 2015 of the guide block2005, and accordingly, the pushrod 1906 may push the guide block 2005 tomove along the first direction (indicated by the arrow B) while thepushrod 1906 is moving downward, and the second spring 2008 may becompressed. At the same time, the compressed second spring 2008 maygenerate a reactive force tending to make the pushrod 1906 being pressedwith the guide block 2005. In some embodiments, the first direction maybe substantially perpendicular to the second direction. In someembodiments, if the first pushing force is larger than the reactiveforce, the pushrod 1906 may slide down along the third slope 2055 andmove to or be close to the bottom edge of the third slope 2055. Then thepushrod 1906 may be separated from the first slope and/or the thirdslope 2055 and may reach below the bottom of the first protrusion 2065.

In some embodiments, if the first pushing force is released, the pushrod1906 may move along an opposite direction of the second direction, andthe pushrod 1906 may slide in a left part of a region formed by thebulge 2045 of the guide block 2005 and the groove 2035. At the sametime, the guide block 2005 may move along an opposite direction of thefirst direction. The pushrod 1906 and the guide block 2005 may stopmoving when the pushrod 1906 moves to a top position of the groove 2035,and accordingly, the pushrod 1906 may be stuck into the groove 2035 ofthe guide block 2005 (see FIG. 21B). Therefore, the liquid chamber 1704may be mounted on the main body 1702 of the respiratory ventilationapparatus. In some embodiments, during the first pushing force isimposed on the liquid chamber 1704, and/or when the liquid chamber 1704is mounted on the main body 1702, the heater plate 1710 may be pressedby the bottom surface of the liquid chamber 1704, and may move down inthe second hole 1711. In some embodiments, one or more springs 2202beneath the heater plate 1710 may be pressed, and then the heater plate1710 and the heat-conducting plate 1810 at the bottom of the liquidchamber 1704 may form a close contact (or an intimate contact).

FIGS. 21C and 21D illustrate an exemplary process for removing a liquidchamber from a main body of a respiratory ventilation apparatus by apush-push mechanism according to some embodiments of the presentdisclosure. As shown in FIG. 21C, the liquid chamber 1704 may be drivenby a second pushing force and then be released from the main body 1702.In some embodiments, the second pushing force may be generated by a user(e.g., the subject 180). The direction of the second pushing force maybe indicated by the arrow A (e.g., a vertical direction, also referredto as the second direction). Upon being driven by the second pushingforce, the pushrod 1906 may move with the liquid chamber 1704 along thesecond direction (indicated by the arrow A) and move down in a rightpart of a region formed by the bulge 2045 of the guide block 2005 andthe groove 2035. At the same time, the guide block 2005 may move alongthe opposite direction of the first direction (indicated by the arrowB′). In some embodiments, the movement of the guide block 2005 along theopposite direction of the first direction may be driven by the reactiveforce of the second spring 2008. Then the pushrod 1906 may be releasedfrom the groove 2035 and may reach below the bottom of the secondprotrusion 2075.

In some embodiments, if the second pushing force is released, the one ormore pressed springs CH 0902 beneath the heater plate 1710 may drive theheater plate 1710 to move along the opposite direction of the seconddirection. The movement of the heater plate 1710 may drive the liquidchamber 1704 to move along the opposite direction of the seconddirection, and the movement of the liquid chamber 1704 may lead thepushrod 1906 to move along the opposite direction of the seconddirection. Then the pushrod 1906 may move along the second slope of theguide block 2005, and the guide block 2005 may move along an oppositedirection of the first direction (indicated by the arrow B′). Therefore,the liquid chamber 1704 may be released from the main body 1702 of therespiratory ventilation apparatus 1700 (see FIG. 21D), and the liquidchamber 1704 may be removed from the main body 1702.

It should be noted that the above description of the push-push mechanism1904 is merely provided for the purposes of illustration, and notintended to limit the scope of the present disclosure. For personshaving ordinary skills in the art, multiple variations and modificationsmay be made under the teachings of the present disclosure. However,those variations and modifications do not depart from the scope of thepresent disclosure. In some embodiments, the push-push mechanism 1904may be mounted on the main body 1702 of the respiratory ventilationapparatus in different directions, thus different pushing forces may beneeded to mount and/or remove the liquid chamber 1704 from the main body1702. In some embodiments, the guide block 2005 may be set as mirrorsymmetrical to that shown in FIGS. 20A-21D. In some embodiments, thepush-push mechanism 1904 may include more than one pushrod. In someembodiments, the push-push mechanism 1904 may be configured forunlocking the liquid chamber 1704 from the main body of the respiratoryventilation apparatus 110 by pushing the liquid chamber 1704 in a pushdirection. The push direction may be substantially perpendicular to aliquid level in the liquid chamber 1704. In some embodiments, thepush-push mechanism 1904 may be configured to form an energy storagemeans for storing the energy of the pushing action and for releasing thestored energy after the liquid chamber 1704 is unlocked by applying aforce on the liquid chamber substantially in the opposite direction ofthe push direction. It should be noted that in some embodiments, thetank cover of the liquid chamber 1704 may be configured to be closableby pushing in the push direction. In some embodiments, the tank cover ofthe liquid chamber 1704 may be configured to be openable by pullingsubstantially in a direction opposite to the push direction. In someembodiments, in the operation of the respiratory ventilation apparatus110, a user may couple the humidification assembly (e.g., the liquidchamber 1704) with the main body of the respiratory ventilationapparatus 110 by pushing the liquid chamber 1704 in the push direction,and/or unlock the humidification assembly with the main body by pushingthe liquid chamber 1704 substantially in the push direction. In someembodiments, the user may place the humidification assembly on a surfaceof the respiratory ventilation apparatus 110 before the operation ofcoupling. In some embodiments, the operation of coupling thehumidification assembly may include locking the tank cover with the tankby pushing the tank cover substantially in the push direction.

FIGS. 22A-22D illustrate an exemplary heater plate according to someembodiments of the present disclosure. In some embodiments, the heaterplate 1710 may include one or more fixing columns 2204 (e.g., fourfixing columns illustrated in FIG. 22D) configured to fix a first end ofone or more springs 2202 (e.g., four springs illustrated in FIGS. 22Cand 22D). Correspondingly, the base plate 2203 of the main body 1702 mayinclude one or more fixing columns or bolts configured to fix a secondend the springs 2202. Therefore, the heater plate 1710 may be mounted onor fixed to the base plate 2203 of the main body 1702 via the one ormore springs 2202. As illustrated in FIG. 17, the heater plate 1710 maybe capable of moving up and down through the second hole 1711 upon beingdriven by a pressure or upon releasing the pressure. To facilitate themovement of the heater plate 1710 in the second hole 1711, the heaterplate 1710 may include one or more guide bumps 2201. For example, theheater plate 1710 may include one guide bump 2201 in each side of theheater plate 1710. Correspondingly, the side wall(s) of the second hole1711 may include one or more guide grooves (not shown). The guide bumpsand the guide grooves may be configured to guide the movement of theheater plate 1710 and/or limit the position of the heater plate 1710.For example, the second hole 1711 may include one guide groove in eachside wall thereof. It should be noted that in some embodiments, theheater plate 1710 may include one or more guide grooves while the secondhole 1711 may include one or more guide bumps corresponding to the guidegrooves.

FIG. 23A-23D illustrate an exemplary connection between a liquid chamberand a main body of a respiratory ventilation apparatus according to someembodiments of the present disclosure. FIG. 23A shows an axonometricdrawing of a connecting piece 2301 coupled with a tank cover 2302 of aliquid chamber 2303. It should be noted that the cover shell of the tankcover 2302 is not shown in FIG. 23A for illustration purposes. FIG. 23Bshows an axonometric drawing of the connecting piece 2301. FIG. 23Cshows an axonometric drawing of the tank cover 2302. FIG. 23D shows asection view of a sealed connection between the gasket 2305 of theconnecting piece 2301 and the tank cover 2302.

The connecting piece 2301 may be configured to provide a sealedconnection between the tank cover 2302 and the main body of therespiratory ventilation apparatus 110, so as to ensure the air tightnessof the pressurized respiratory gas flowing between the liquid chamber2303 and the main body of the respiratory ventilation apparatus 110. Insome embodiments, the connecting piece 2301 may be fixed to the mainbody of the respiratory ventilation apparatus 110. In some embodiments,the connecting piece 2301 may be in detachable connection with the mainbody of the respiratory ventilation apparatus 110. In some embodiments,the housing of the main body of the respiratory ventilation apparatus110 may include a space (e.g., the chamber 2502) for accommodating theconnecting piece 2301. In some embodiments, the connecting piece 2301and the main body may be an integral piece. In some embodiments, if theliquid chamber 2303 is fixed to a support plate (e.g., the support plate1707 shown in FIG. 17) of the main body of the respiratory ventilationapparatus 110, and the tank cover 2302 is closed with the tank of theliquid chamber 2303, the connecting piece 2301 may provide a sealedconnection between the tank cover 2302 and the main body of therespiratory ventilation apparatus 110. In some embodiments, theconnecting piece 2301 may be fixed to or mounted on the tank cover 2302.In some embodiments, the connecting piece 2301 may be in detachableconnection with the tank cover 2302. In some embodiments, the tank cover2302 may include a space for mounting the connecting piece 2301. In someembodiments, the connecting piece 2301 and the tank cover 2302 may be anintegral piece.

As shown in FIG. 23B, the connecting piece 2301 may include a supportframe 2304 and/or a gasket 2305. The support frame 2304 may beconfigured to support the gasket 2305 and/or facilitate the fixation ofthe gasket 2305 with the main body of the respiratory ventilationapparatus 110. In some embodiments, the gasket 2305 may include adeclining surface. In some embodiment, there may be a tilt angle betweenthe declining surface of the connecting piece 2301 (or the gasket 2305)and a horizontal plane. In some embodiments, the tilt angle may besubstantially within 0 degree to 90 degrees (e.g., within 30 to 60degrees). The gasket 2305 may be configured to form a sealed connectionbetween the tank cover 2302 and the main body of the respiratoryventilation apparatus 110. In some embodiments, the gasket 2305 mayinclude a first aperture 2306 and/or a second aperture 2307 set on thedeclining surface. In some embodiments, support frame 2304 may includeat least one gas flow passage in connection with the first aperture 2306and/or the second aperture 2307. Each of the at least one gas flowpassage may be in connection with one or more gas passages in the mainbody of the respiratory ventilation apparatus 110. In some embodiments,the edge of the first aperture 2306 may form a first protrudingstructure 2311. In some embodiments, the edge of the second aperture2307 may include a second protruding structure 2312. The firstprotruding structure 2311 and/or the second protruding structure 2312may protrude to the tank cover 2302. The first protruding structure 2311and/or the second protruding structure 2312 may facilitate the sealingconnection between the connecting piece 2301 and the tank cover 2302. Insome embodiments, the cross section of the first protruding structure2311 and/or the second protruding structure 2312 may have a C shape, anS shape, an O shape, a V shape, an M shape, an N shape, a Z shape, a Ushape, or one or more folds, or the like, or a combination thereof. Insome embodiments, the first protruding structure 2311 and/or the secondprotruding structure 2312 may be made of a soft material (e.g.,silicone, soft glue, or the like, or any combination thereof). In someembodiments, the first protruding structure 2311 and/or the secondprotruding structure 2312 may be made of the same material(s) as that ofthe gasket 2305. In some embodiments, the first protruding structure2311 and/or the second protruding structure 2312 may be made ofdifferent material(s) from that of the gasket 2305. In some embodiments,the thickness of the first protruding structure 2311 and/or the secondprotruding structure 2312 may be less than that of the gasket 2305.

In some embodiments, the gasket 2305 may be fixed on the main body(e.g., the support frame 2304 of the connecting piece 2301) of therespiratory ventilation apparatus 110. In some embodiments, the gasket2305 may be detachably connected to the main body (e.g., the supportframe 2304 of the connecting piece 2301) of the respiratory ventilationapparatus 110 through a, for example, glue joint, bonding, boltedconnection, or the like, or a combination thereof. In some embodiments,the support frame 2304 may be made of a rigid plastic material.Exemplary rigid plastic materials may include acrylonitrile butadienestyrene (ABS) resins materials, polyformaldehyde (POM) plasticsmaterials, polystyrene (PS) plastics materials, polymethyl methacrylate(PMMA) plastic materials, polycarbonate (PC) plastic materials,poly(ethylene terephthalate) (PET) plastic materials, poly(butyleneterephthalate) (PBT) plastic materials, or poly(phenylene oxide) (PPO)plastic materials, or the like, or any combination thereof. In someembodiments, the gasket 2305 may be made of an elastic materialincluding, for example, elastomer, rubber (e.g., silicone), or the like,or a combination thereof. In some embodiments, the gasket 2305 mayinclude a protruding edge at the interface of the support frame 2304 andthe gasket 2305. The protruding edge of the gasket 2305 may facilitate asealing connection between the connecting piece 2301 and the main bodyof the respiratory ventilation apparatus 110.

As shown in the FIGS. 23A-23D, the declining surface of the gasket 2305may face a corresponding declining surface of the connecting plate 2308of the tank cover 2302. The tank cover 2302 may include a gas inlet port2309 and a gas outlet port 2310. The first aperture 2306 on thedeclining surface of the gasket 2305 may correspond to the gas inletport 2309 of the tank cover 2302, the second aperture 2307 on thedeclining surface of the gasket 2305 may correspond to the gas outletport 2310 of the tank cover 2302. In some embodiments, if the liquidchamber 2303 is fixed to a support plate (e.g., the support plate 1707shown in FIG. 17) of the main body of the respiratory ventilationapparatus 110, and the tank cover 2302 is closed with the tank of theliquid chamber 2303, the tank cover 2302 may be in a sealed connectionwith the main body of the respiratory ventilation apparatus 110 throughthe gasket 2305. The first aperture 2306 of the gasket 2305 and the gasinlet port 2309 of the tank cover 2302 may be capable of introducing thepressurized respiratory gas from the main body of the respiratoryventilation apparatus 110 into the liquid chamber 2303. The secondaperture 2307 of the gasket 2305 and the gas outlet port 2310 of thetank cover 2302 may be capable of introducing the humidified andpressurized respiratory gas from the liquid chamber 2303 back into themain body of the respiratory ventilation apparatus 110.

As shown in FIG. 23D, if the tank cover 2302 is closed, the firstprotruding structure 2311 may be extruded and deform, and then may forma closed line contact with the connecting plate 2308 (e.g., around theedge of the gas inlet port 2309 and/or the gas outlet port 2310) of thetank cover 2302. Therefore, the air tightness of the respiratory gasflowing between the main body of the respiratory ventilation apparatus110 and the liquid chamber 2303 may be ensured.

FIG. 24 illustrate another exemplary connection between a liquid chamberand a main body of a respiratory ventilation apparatus according to someembodiments of the present disclosure. As shown in FIG. 24, the liquidchamber 2403 may include a tank 2401 and a tank cover 2402. Theconnection piece 2301 may be configured to provide a sealed connectionbetween a portion of the tank 2401 and the main body of the respiratoryventilation apparatus 110. In some embodiments, the connection piece2301 may not directly contact with the tank cover 2402. Therefore, thestate of the tank cover 2402 (open or close) may not affect theconnection between the connection piece 2301 and the tank 2401. In someembodiments, the tank cover 2402 may be opened up by a handle 2404. Thehandle 2404 may have one or more notches which may make the handle 2404easier to operate. In some embodiments, the tank cover 2402 may be aslide cover. In some embodiments, the tank cover 2402 may slide alongthe horizontal direction or slide along a direction with a tilt angle(such as, 10 degrees, 20 degrees, 30 degrees, or the like) relative tothe horizontal direction. In some embodiments, to ensure a sealedconnection between the tank 2401 and the tank cover 2402, an interface2405 of the tank 2401 and the tank cover 2402 may be equipped with asealing material (or an elastic material) including for example, asilicone, or the like.

FIG. 25 illustrate an exemplary connection piece fixed to a main body ofa respiratory ventilation apparatus according to some embodiments of thepresent disclosure. In some embodiments, as shown in FIG. 25, aprotruding platform 2501 may be set at the gas outlet port of a noisereduction box (e.g., the noise reduction box 801) or in a gas passagebetween the gas outlet port of the noise reduction box and theconnecting piece 2301. In some embodiments, the protruding platform 2501may include a gas passage corresponding to a gas outlet. In someembodiments, the gas passage between the gas outlet port of the noisereduction box and the connecting piece 2301 may form a chamber 2502. Thechamber 2502 may include a bottom surface. In some embodiments, if thegas outlet of the protruding platform 2501 is in the vertical direction,the upper edge of the protruding platform 2501 may be set higher thanthe bottom surface of the chamber 2502. In some embodiments, if the gasoutlet of the protruding platform 2501 is in the horizontal direction,the lower edge of the gas passage in the protruding platform 2501 may beset higher than the bottom surface of the chamber 2502. In somesituations, if the respiratory ventilation apparatus 110 is placedobliquely (i.e., the liquid chamber is placed obliquely), a certainamount of liquid in the liquid chamber (e.g., the liquid chamber 1704,the liquid chamber 2403) may accidentally flow from the liquid chamber,via the gas inlet port (e.g., the gas inlet port 2309) and/or the gasoutlet port (e.g., the gas outlet port 2310) of the liquid chamber,and/or the connecting piece 2301, and into the chamber 2502 of the mainbody of the respiratory ventilation apparatus 110. In some embodiments,the protruding platform 2501 may prevent the liquid from entering orreaching an interior space of the main body of the respiratoryventilation apparatus, the detection module 250, the noise reductionassembly 240, and/or the gas pressurization unit 210.

In some embodiments, the protruding platform 2501 may be fixed to thegas outlet port of the noise reduction assembly 240, the gaspressurization unit 210, or may be fixed in the chamber 2502. In someembodiments, the protruding platform 2501 may be detachably connectedwith the gas outlet port of the noise reduction assembly 240, the gaspressurization unit 210, or the chamber 2502 through a detachableconnection structure, for example, a thread structure, a slot structure,or a snap joint structure, or the like, or any combination thereof.

FIGS. 26A-26C illustrate an exemplary connection between a liquidchamber and a main body of a respiratory ventilation apparatus accordingto some embodiments of the present disclosure. The connecting piece 2601may be configured to provide a sealed connection between the tank cover2603 and the main body 2602 of the respiratory ventilation apparatus110. In some embodiments, the connecting piece 2601 may include a firstthread hose 2601 a and/or a second thread hose 2601 b. The hollow holeof the first thread hose 2601 a may form a gas outlet port of the mainbody 2602. The hollow hole of the second thread hose 2601 b may form agas inlet port of the main body 2602. In some embodiments, the firstthread hose 2601 a and/or the second thread hose 2601 b may be made ofan elastic material including, for example, elastomer, rubber (e.g.,silicone), or the like, or a combination thereof.

In some embodiments, the tank cover 2603 of the liquid chamber mayinclude a connecting plate 2606 equipped with a gas inlet port 2604and/or a gas outlet port 2605 of the tank cover 2603. The gas outletport of the main body 2602 may correspond to the gas inlet port 2604 ofthe tank cover 2603. The gas inlet port of the main body 2602 maycorrespond to the gas outlet port 2605 of the tank cover 2603. In someembodiments, as shown in FIG. 26A, the hollow holes of the first threadhose 2601 a and the second thread hose 2601 b of the connecting piece2601 may be set substantially vertical at the first interface betweenthe main body 2602 of the respiratory ventilation apparatus 110 and theliquid chamber. Correspondingly, the connecting plate 2606 may be setsubstantially horizontal on the tank cover 2603. Therefore, if the tankcover 2603 is closed, a sealed connection may be formed between the mainbody 2602 of the respiratory ventilation apparatus 110 and the liquidchamber through the connecting piece 2601.

FIG. 27 illustrates an exemplary connection between a connecting piece2601 and a connecting plate 2606 of a tank cover 2603 when the tankcover 2603 is closed according to some embodiments of the presentdisclosure. As shown in FIG. 27, if the tank cover 2603 is closed, theconnecting piece 2601 may be connected with the connecting plate 2606 ofthe tank cover 2603, and may form a closed line contact with theconnecting plate 2606, which may ensure the air tightness of thepressurized respiratory gas flowing between the liquid chamber and themain body of the respiratory ventilation apparatus 110.

FIGS. 28A-28E illustrate exemplary thread hoses of a connecting pieceaccording to some embodiments of the present disclosure. In someembodiments, a thread hose of the connecting piece may include one ormore pleated structures on its side wall(s). The one or more pleatedstructures may be any shape such as, a quarter-circle shape, asemicircle shape, an arc shape, a slot shape, a U shape, a V shape, a Zshape, an M shape, an S shape, a C shape, an O shape, or the like, orany combine of thereof. The one or more pleated structures may provide acertain elasticity for the connecting piece to form a closed linecontact with the tank cover 2603 when the tank cover 2603 is closed.

In some embodiments, at the top edge of the thread hose of theconnecting piece, there may be one or more flexural structures having,for example, a circle shape, an annulus shape, an arc shape, a crescentshape, a tilt linear shape, a slot shape, a U shape, a V shape, a Zshape, an M shape, an S shape, a C shape, an O shape, or the like, orany combine of thereof. The one or more flexural structures may causethe connecting piece to form one or more closed line contacts with thetank cover 2603 to ensure the air tightness of the pressurizedrespiratory gas flowing between the liquid chamber and the main body ofthe respiratory ventilation apparatus 110.

For example, in FIG. 28A, the thread hose of the connecting piece mayhave a two layer pleated structure on the side wall(s) thereof. In FIG.28B, the thread hose of the connecting piece may include aquarter-circle shaped pleated structure 2801 close to the top edge ofthe thread hose and an arc shaped pleated structure 2802 close to thebottom of the thread hose. In some embodiments, the quarter-circleshaped pleated structure 2801 and/or the arc shaped pleated structure2802 may be set on the inner surface of the thread hose. In someembodiments, the thread hose may include an S shaped flexural structure(not shown) on its top edge. In FIG. 28C, the thread hose may include adouble C shaped flexural structure 2804 on its top edge. The double Cshaped flexural structure 2804 may form two closed line contacts betweenthe connecting piece and the tank cover when the tank cover is closed.In FIG. 28D, the thread hose may include an approximate round structure2805 on its top edge. In FIG. 28E, the thread hose may include ahalf-crescent shaped flexural structure 2806. The approximate roundstructure 2805 and the half-crescent shaped flexural structure 2806 mayprovide a sealed closed line contact between the connecting piece andthe tank cover when the tank cover is closed. In some embodiments, thethread hose may include a tilt linear shaped flexural structure (notshown) on its top edge and a trapezoid shaped slot (not shown) on itsinner surface. All the thread hoses described above may be configured toensure the air tightness of the pressurized respiratory gas flowingbetween the liquid chamber and the main body of the respiratoryventilation apparatus 110.

FIG. 29A-29D illustrate an exemplary baseplate of a respiratoryventilation apparatus 110 according to some embodiments of the presentdisclosure. FIG. 29A shows an outer surface of the baseplate 2900. FIG.29B shows an inner surface of the baseplate 2900. FIG. 29C shows a sidecross-sectional view of the baseplate 2900. FIG. 29D shows an enlargedview of one or more holes 2920 set on the baseplate 2900. The one ormore holes 2900 may be configured to drain a certain amount of liquidsleaking from a liquid chamber (e.g., the liquid chamber 1704 shown inFIG. 17). In some embodiments, during adding liquids into the liquidchamber or in other situations (e.g., if the respiratory ventilationapparatus 110 is placed obliquely (i.e., the liquid chamber is placedobliquely), or the liquid chamber is untightly sealed), a certain amountof liquids may leak from the liquid chamber and onto the baseplate 2900below the liquid chamber. The leaked liquids may flow out of therespiratory ventilation apparatus 110 through the holes 2920. Therefore,the leaked liquids may not accumulate on the baseplate 2900. As shown inFIG. 29C and FIG. 29D, the cross section of each of the one or moreholes 2920 may have a step shape. In some embodiments, the holes 2920may facilitate the draining of the leaked liquids. In some embodiments,the holes 2920 may prevent a foreign matter (e.g., a finger of thesubject 180) from entering the respiratory ventilation apparatus 110. Insome embodiments, the one or more holes 2920 may conform tointernational standards to make the overall appearance of therespiratory ventilation apparatus 110 more elegant and/or to prevent thesubject 180 from directly looking into the internal space of therespiratory ventilation apparatus 110 from the outside.

FIGS. 30A and 30B illustrate an exemplary liquid chamber of arespiratory ventilation apparatus according to some embodiments of thepresent disclosure. FIGS. 30A and 30B shows schematic diagrams of theliquid chamber 3000 in an open mode from different views. As shown inFIGS. 30A and 30B, the liquid chamber 3000 may include a tank 3002 and atank cover 3004. In some embodiments, the tank cover 3004 may bepivotally connected to the tank 3002 through a connection mechanism. Insome embodiments, the liquid chamber 3000 may be openable from a frontsurface of the respiratory ventilation apparatus 110.

The tank 3002 may be configured to accommodate one or more liquids(e.g., water and/or drug). In some embodiments, the tank 3002 mayinclude an opening for filling at least one of the one or more liquids.In some embodiments, the opening may be openable by opening the tankcover 3004 and/or closable by closing the tank cover 3004. In someembodiments, the humidification assembly 220 and the main body of therespiratory ventilation apparatus 110 may be fluidically connectable byclosing the tank cover 3004 and/or fluidically disconnectable by openingthe tank cover 3004. In some embodiments, the tank 3002 and the mainbody may be attachable with each other by moving the tank 3002 in anattaching direction relative to the main body with an angle between therotational axis and the attaching direction between 20°-160°. In someembodiments, the tank 3002 and the main body may be unlockable from eachother by moving the tank 3002 in an unlocking direction relative to themain body with an angle between the rotational axis and the unlockingdirection between 20°-160°. In some embodiments, the angle between theattaching direction and the unlocking direction may be between −45° and45°.

In some embodiments, the humidification assembly 220 and the main bodyof the respiratory ventilation apparatus 110 may be fluidicallyconnectable through at least a connecting port for forming at least oneflow channel between the main body of the respiratory ventilationapparatus 110 and the liquid chamber 3000. In some embodiments, the atleast one connecting port (e.g., the connecting piece 2301) may includea gas inlet port (e.g., the second aperture 2307) and a gas outlet port(e.g., the first aperture 2306). In some embodiments, the connectingport (e.g., the connecting piece 2301) may include an axial sealingmember (e.g., the first protruding structure 2311 and/or the secondprotruding structure 2312) for fluidically sealingly connecting the gasinlet port 3102 and the gas outlet port 3104. In some embodiments, aninner surface of the axial sealing member may form at least partiallythe flow channel. In some embodiments, the axial sealing member maydefine a sealing plane. In some embodiments, the angle between thesealing plane and the liquid level in the liquid chamber 3000 may bebetween −75°-75° (e.g., −30°-30°. In some embodiments, the angle betweenthe sealing plane and the attaching direction may be between 15°-65°. Insome embodiments, the angle between the liquid level and the attachingdirection and/or the unlocking direction may be between 45°-135°.

In some embodiments, the liquid chamber 3000 may be in detachableconnection with the main body of the respiratory ventilation apparatus110 through a push-push mechanism (e.g., the push-push mechanism 1904).

In some embodiments, a push direction of the push-push mechanism may besubstantially perpendicular to the rotational axis of the connectionmechanism. In some embodiments, the humidification assembly 220 and themain body of the respiratory ventilation apparatus 110 may befluidically connectable by closing the tank cover 3004 in the pushdirection of the push-push mechanism while the tank 3002 is attached tothe main body, and/or by attaching the liquid chamber 3000 to the mainbody in the push direction while the tank cover 3004 is closed.

The shape of the tank 3002 may include a cube, a cuboid or an irregularshape that may fit with a main body of the respiratory ventilationapparatus 110. The tank 3002 may be transparent, opaque, orsemi-transparent. In some embodiments, the tank 3002 may include one ormore marks for indicating the liquid level (e.g., water level) of theone or more liquids in the tank 3002. For example, the tank 3002 mayinclude a first stick mark on a side surface of the tank 3002 indicatingan allowable minimum liquid level, and/or a second stick mark on a sidesurface of the tank 3002 indicating an allowable maximum liquid level.As another example, the tank 3002 may include a flotage (e.g., a coloredfloating ball) inside the tank 3002 floating on the one or more liquids.In some embodiments, the tank 3002 may be equipped with a sensor fordetecting the liquid level of the one or more liquids. More descriptionsof the tank 3002 may be found elsewhere in the present disclosure (e.g.,FIGS. 18A, 18B, and 32A-32C and the descriptions thereof).

In some embodiments, the shape of the tank cover 3004 may be similar toor different from the shape of the tank 3002. The shape of the tankcover 3004 may include a cube, a cuboid or an irregular shape that mayfit with the main body of the respiratory ventilation apparatus 110. Thematerial of the tank cover 3004 may be similar to or different from thematerial of the tank 3002. The tank cover 3004 may be transparent,opaque, or semi-transparent. More descriptions of the tank cover 3004may be found elsewhere in the present disclosure (e.g., FIGS. 31, and37A-42B, and the descriptions thereof).

In some embodiments, the tank cover 3004 may include a handle 3006, oneor more buckles (e.g., a first buckle 3008 a, or a second buckle 3008 b)on the rear side of the handle 3006. The handle 3006 may be configuredto facilitate the opening and/or closing of the tank cover 3004. Thetank 3002 may include one or more notches (e.g., a first notch 3010 a,and/or a second notch 3010 b) in positions relative to the handle 3006,specifically corresponding to the one or more buckles of the handle3006. If the tank cover 3004 is closed, the tank cover 3004 may befastened with the tank 3002 through the cooperation of the one or morebuckles and the one or more notches. In some embodiments, the lower edgeof the first notch 3010 a and/or the second notch 3010 b may be equippedwith a transverse bar. In some embodiments, the first buckle 3008 aand/or the second buckle 3008 b may be fastened by the transverse bar,so that the tank cover 3004 can be fastened with the tank 3002.

In some embodiments, the tank cover 3004 may be pivotally connected tothe tank 3002 through a connection mechanism 3009. In some embodiments,the tank cover 3004 may be pivotally connected to the tank 3002 throughthe connection mechanism 3009 with a rotational axis. In someembodiments, the tank cover 3004 may be opened by rotating relative tothe tank 3002 to a certain angle (e.g., 90 degrees, 100 degrees, etc.).The certain angle may be associated with a maximum rotary movement ofthe tank cover 3004. In some embodiments, the liquid chamber 3000 may becapable of being opened from a front surface of the respiratoryventilation apparatus 110. In some embodiments, as shown in FIGS. 30Aand 30B, the connection mechanism 3009 may be set on a rear side (orback surface) of the respiratory ventilation apparatus 110, the handle3006 may be set on a front surface of the respiratory ventilationapparatus 110, so that when the tank cover 3004 is opened, anundersurface of the tank cover 3004 may be substantially upright andfacing the front surface of the respiratory ventilation apparatus 110.In some embodiments, the connection mechanism 3009 may be set on a sidesurface of the respiratory ventilation apparatus 110 away from the mainbody of the respiratory ventilation apparatus 110, the handle 3006 maybe set on a top surface of the respiratory ventilation apparatus 110,and the tank cover 3004 may be opened such that an undersurface of thetank cover 3004 may be substantially upright and facing the main body ofthe respiratory ventilation apparatus 110 (not shown). In someembodiments, the connection mechanism 3009 may be configured as a guideslot (not shown), and the tank cover 3004 may be opened by movinghorizontally relative to the tank 3002. More descriptions of theconnection mechanism 3009 may be found elsewhere in the presentdisclosure (e.g., FIGS. 33A-36B and the descriptions thereof).

In some embodiments, the liquid chamber 3000 may include a connectingpiece (e.g., the fixing gasket 1806, and/or the tank cover sealinggasket 1807 shown in FIGS. 18A and 18B) configured to provide a sealedconnection between the tank 3002 and the tank cover 3004, so that whenthe tank cover 3004 is closed with the tank 3002, the liquid chamber3000 may be sealed. The connecting piece may be made a material with aproperty of sealing, flexibility, elasticity, or the like, or anycombination thereof. For example, the connecting piece may includeflexible rubber (e.g., silicone) or a mixture of flexible rubber andhard rubber. In some embodiments, the connecting piece may be fixed onthe bottom surface of the tank cover 3004 and/or the upper surface ofthe tank 3002.

It should be noted that the above description of the liquid chamber 3000is merely provided for the purposes of illustration, and not intended tolimit the scope of the present disclosure. For persons having ordinaryskill in the art, multiple variations and modifications may be madeunder the teachings of the present disclosure. However, those variationsand modifications do not depart from the scope of the presentdisclosure. For example, the tank 3002 of the liquid chamber 3000 may beequipped with a sensor for detecting the liquid level of the one or moreliquids. The respiratory ventilation apparatus 110 may generate areminder based on the signal of the sensor when the liquid level is lessthan a predetermined level. As another example, the tank cover 3004 mayslide inclinedly relative to the tank 3002. As a further example, thetank cover 3004 may slide in a certain degree of arc relative to thetank 3002.

FIG. 31 illustrates an exemplary tank cover of a liquid chamber of arespiratory ventilation apparatus according to some embodiments of thepresent disclosure. The tank cover 3004 may include a cover shell. Thecover shell may include a front surface corresponding to the frontsurface of the respiratory ventilation apparatus 110, a back surfacecorresponding to the back surface the respiratory ventilation apparatus110, a top surface away from a corresponding tank (e.g., the tank 3002),a bottom surface that may contact with the tank 3002, a side surfaceclose to the main body of the respiratory ventilation apparatus 110, aside surface away from the main body of the respiratory ventilationapparatus 110, etc. The tank cover 3004 may include a gas inlet port3102, a gas outlet port 3104, a handle 3006, a connecting piece 3108 ofthe connection mechanism 3009, etc. The gas inlet port 3102 may beconfigured to introduce the pressurized respiratory gas from the mainbody of the respiratory ventilation apparatus 110 into the liquidchamber (e.g., the liquid chamber 3000). The gas outlet port 3104 may beconfigured to introduce the humidified and pressurized respiratory gasfrom the liquid chamber back into the main body of the respiratoryventilation apparatus 110.

As shown in FIG. 31, the handle 3006 may be set on the front surface ofthe tank cover 3004. The connecting piece 3108 of the connectionmechanism 3009 may be set on a back surface of the tank cover 3004. Thegas inlet port 3102 and the gas outlet port 3104 may be set on the sidesurface (e.g., a declining surface) of the tank cover 3004 close to themain body of the respiratory ventilation apparatus 110. In someembodiments, the gas inlet port 3102 and the gas outlet port 3104 may beset on a portion of the bottom surface of the tank cover 3004 (see FIG.26B). The gas inlet port 3102 and the gas outlet port 3104 may be setclose to the main body of the respiratory ventilation apparatus and maynot contact with the tank 3002.

FIGS. 32A-32C illustrate an exemplary tank of a liquid chamber of arespiratory ventilation apparatus according to some embodiments of thepresent disclosure. FIGS. 32A-32C shows the tank 3002 in differentviews. The tank 3002 may include a front surface facing a user of therespiratory ventilation apparatus 110, a back surface away from the userof the respiratory ventilation apparatus 110, a top surface that maycontact with the tank cover 3004, a bottom surface away from the tankcover 3004, a side surface close to the main body of the respiratoryventilation apparatus 110, a side surface away from the main body of therespiratory ventilation apparatus 110, etc. The tank 3002 may include aconnecting piece 3202 of the connection mechanism 3009, a bolt 3204, oneor more notches 3010, etc.

As shown in FIGS. 32A-32C, the connecting piece 3202 of the connectionmechanism 3009 may be set on the back surface of the tank 3002. Theconnecting piece 3202 of the connection mechanism 3009 and theconnecting piece 3108 of the connection mechanism 3009 may form anintegral connection mechanism 3009. The bolt 3204 may be set below thebottom surface of the tank 3002. The bolt 3204 may be fixed to thebottom surface of the tank 3002 via a connecting piece 3205. In someembodiments, the bolt 3204 may be involved in a push-push mechanism(e.g., the push-push mechanism 1904 shown in FIGS. 19-21D). The one ormore notches 3010 may be set on a front surface of the tank 3002 to bein accordance with the handle 3006 of the tank cover 3004.

In some embodiments, the side surface of the liquid chamber 3000 closeto the main body of the respiratory ventilation apparatus 110 may havean angle relative to the horizontal plane. In some embodiments, theangle between the side surface of the tank 3002 close to the main bodyof the respiratory ventilation apparatus 110 and the horizontal planemay be greater than the angle between the declining surface of the tankcover 3004 and the horizontal plane, which may facilitate a sealedconnection between the tank cover 3004 and the main body of therespiratory ventilation apparatus 110. In some embodiments, the frontsurface of the tank 3002, the back surface of the tank 3002, and/or theside surface of the tank 3002 away from the main body of the respiratoryventilation apparatus 110 may extend downwards to form one or morebaffles (e.g., the baffles 3011 a, 3011 b, and/or 3011 c) below thebottom surface. If the liquid camber is mounted on the respiratoryventilation apparatus 110, the baffles 3011 a, 3011 b, and/or 3011 c mayform a space to accommodate a part of base of the main body of therespiratory ventilation apparatus 110 (e.g., a portion of the baseplate4410, and/or the heating device 4414, etc.). If the liquid chamber isplaced separately, the baffles 3011 a, 3011 b, and/or 3011 c may supportthe tank 3002 (or the liquid chamber) and/or protect the bolt 3204 andthe connecting piece 3205. In some embodiments, the bolt 3204 and theconnecting piece 3205 may also be referred to as a pushrod (e.g., thepushrod 1906 illustrated in FIG. 19).

FIGS. 33A and 33B illustrate an exemplary tank according to someembodiments of the present disclosure. As shown in FIGS. 33A and 33B,the tank 3300 may include one or more first connecting pieces 3310. Insome embodiments, each of the one or more first connecting pieces 3310may include a pin hole 3320, a protruding column 3340, and/or a firstinclined guide surface 3330.

FIGS. 34A and 34B illustrate an exemplary tank cover according to someembodiments of the present disclosure. As shown in FIGS. 34A and 34B,the tank cover 3400 may include one or more second connecting pieces3410. In some embodiments, each of the one or more second connectingpieces 3410 may include a pin 3420, a second inclined guide surface3430, a groove 3440, and/or a guide slot 3450. In some embodiments, thepin 3420 may be placed into the pin hole 3320, so that the tank cover3400 may be fixed to the tank 3300. In the process of opening and/orclosing of the tank cover 3400, the pin 3420 may rotate in the pin hole3320. In some embodiments, the first inclined guide surface 3330 of thefirst connecting piece(s) 3310 and the second inclined guide surface3430 of the second connecting piece(s) 3410 may configured to facilitatethe installation of the tank cover 3400 on the tank 3300. In someembodiments, the guide slot 3450 may include a first end adjacent to thegroove 3440 and a second end away from the groove 3440. In someembodiments, the depth of the guide slot 3450 may be gradually changedfrom a relatively small value at the first end to a relatively largevalue at the second end. In some embodiments, the guide slot 3450 may becurved to fit with the rotation movement of the tank cover 3400 relativeto the tank 3300.

FIGS. 35A and 35B illustrate a corporation of a protruding column of afirst connecting piece of a tank and a groove of a second connectingpiece of a tank cover according to some embodiments of the presentdisclosure. In some embodiments, as shown in FIG. 35A, if the tank cover3400 is closed, the protruding column 3340 may be located at or close tothe second end of the guide slot 3450. In the process of opening thetank cover 3400, the protruding column 3340 may gradually slide alongthe guide slot 3450 from the second end to the first end of the guideslot 3450. The design of the relatively small depth of the first end ofthe guide slot 3450 relative to the second end of the guide slot 3450may make it easy for the protruding column 3340 to fall into the groove3440. The design of the relatively large depth of the second end of theguide slot 3450 relative to the first end of the guide slot 3450 mayfacilitate the second end of the guide slot 3450 to accommodate theprotruding column 3340 when the tank cover 3400 is closed. In someembodiments, if the tank cover 3400 is opened to a certain angle, theprotruding column 3340 may fall into the groove 3440 and limit the tankcover 3400 to move back rotarily. Because the groove 3440 and the guideslot 3450 are disconnected and/or the depth of the first end of theguide slot 3450 is smaller than the depth of the groove 3440, theprotruding column 3340 may not be easily detached from the groove 3440.When the protruding column 3340 falls into the groove 3440, the designof the disconnection between the groove 3440 and the guide slot 3450,and/or the design of the relatively small depth of the first end of theguide slot 3450 may prevent the tank cover 3400 from rotating back underno external force (e.g., a force from the user). If a force is imposed(e.g., by a user (e.g., the subject 180)) on the tank cover 3400 toclose the tank cover 3400, the protruding column 3340 may be detachedfrom the groove 3440 and may gradually slide along the guide slot 3450from the first end to the second end of the guide slot 3450 until thetank cover 3400 is closed. In some embodiments, the protruding column3340 may have a hemispherical shape, semi-ellipsoidal shape, or a shapeof other convex structure having a curved surface to reduce the frictionbetween the protruding column 3340 and the guide slot 3450.

FIGS. 36A and 36B illustrate an exemplary connection between a tank anda tank cover of a liquid chamber 3600 according to some embodiments ofthe present disclosure. In some embodiments, the tank cover 3400 may bein pivoted connection with the tank 3300 through a connection mechanism(e.g., the connection mechanism 3009) including the first connectingpiece(s) 3310 and the second connecting piece(s) 3410. In someembodiments, the first connecting piece(s) 3310 may be in pivotconnection with the second connecting piece(s) 3410.

In some embodiments, as shown in FIGS. 36A and 36B, a pair of firstconnecting piece 3310 may be located between a pair of second connectingpieces 3410. In some embodiments, the pair of second connecting pieces3410 may be located between the pair of first connecting pieces 3310. Insome embodiments, as shown in FIGS. 36A and 36B, the first connectingpiece(s) 3310 may be set on a back surface of the tank 3300. In someembodiments, the first connecting piece(s) 3310 may be set on anothersurface of the tank 3300. For example, the first connecting piece(s)3310 may be respectively set on the two side surfaces of the tank 3300and close to the back surface of the tank 3300, and correspondingly, thesecond connecting piece(s) 3410 may be set on the side surfaces of thetank cover 3400 and close to the back surface of the tank cover 3400. Ananother example, the first connecting piece(s) 3310 and the secondconnecting piece(s) 3410 may be concealed in the tank 3300 or the tankcover 3400, occupying a portion of the space of the tank 3300 or thetank cover 3400. As a further example, the first connecting piece(s)3310 and the second connecting piece(s) 3410 may be set on a sidesurface of the liquid chamber 3600 and opposite to the gas inlet portand/or the gas outlet port of the gas passages above the tank 3300(i.e., if the user faces the front surface of the respiratoryventilation apparatus 110, the first connecting piece(s) 3310 and thesecond connecting piece(s) 3410 may be set on the right side surface ofthe liquid chamber 3600).

In some embodiments, the tank 3300 and/or the tank cover 3400 may havean irregular shape. Accordingly, the shapes or sizes of the firstconnecting piece(s) 3310 and/or the second connecting piece(s) 3410 maybe irregular. For example, as shown in FIGS. 36A and 36B, in order tomatch with the irregular shape of the tank 3300 or the tank cover 3400,the lengths of the pair of first connecting pieces 3310 may bedifferent, so that when the tank cover 3400 is opened, an undersurfaceof the tank cover 3400 may be substantially upright and facing the frontsurface of the respiratory ventilation apparatus 110. In someembodiments, if the shape of the tank 3300 and/or the tank cover 3400are regular, the first connecting pieces 3310 and/or the secondconnecting pieces 3410 may be regularly symmetrical.

As shown in FIG. 36B, the second connecting piece(s) 3410 may include orbe connected by a baffle 3660. In some embodiments, if the tank cover3400 is opened to a certain angle, the baffle 3660 may be blocked by aportion of the first connecting piece(s) 3310, thereby preventing overrotation of the tank cover 3400, and limiting a maximum rotary movementof the tank cover 3400. In some embodiments, the liquid chamber 3600 mayinclude one or more mounting shafts between the tank cover 3400 and thetank 3300. An exemplary mounting shaft may refer to a pin 3420 (see FIG.34B). In some embodiments, the mounting shaft(s) may include a firstmounting shaft and a second mounting shaft. In some embodiments, theheight of the first mounting shaft may be larger than the height of thesecond mounting shaft. In some embodiments, the first mounting shaft maybe set higher than the second mounting shaft.

It should be noted that the above description of the connection betweenthe tank 3300 and the tank cover 3400 is merely provided for thepurposes of illustration, and not intended to limit the scope of thepresent disclosure. For persons having ordinary skills in the art,multiple variations and modifications may be made under the teachings ofthe present disclosure. However, those variations and modifications donot depart from the scope of the present disclosure. In someembodiments, the connection between the tank 3300 and the tank cover3400 may be realized in other ways, such as in hinged connection. Forexample, the tank 3300 and the tank cover 3400 may include acolumn-shaped hole on the same horizontal line, respectively, and thetank 3300 and the tank cover 3400 may be connected by a hinge pinpassing through the hole(s). As another example, one end of the tank3300 may include a hollow column with a shape of “C”, andcorrespondingly, one end of the tank cover 3400 may include a columnmatching with the hollow column, so that if the tank cover 3400 isinstalled on the tank 3300, the column may be clamped in the C-shapedhollow column to realize the pivoted connection between the tank 3300and the tank cover 3400.

FIGS. 37A and 37B illustrate an exemplary tank cover according to someembodiments of the present disclosure. In some embodiments, as shown inFIGS. 37A and 37B, the tank cover 3700 may include a cover shell 3710, aconnecting plate 3720, an inner shell 3730, a gas passage sealing frame3740, a bottom plate 3750, a fixing frame 3760 and a tank cover sealingframe 3770. In some embodiments, the connecting plate 3720 may include afirst aperture 3721 and a second aperture 3722. In some embodiments, thefirst aperture 3721 may be a gas inlet port of the tank cover 3700 (alsoreferred to as a humidification assembly gas inlet port). In someembodiments, the second aperture 3722 may be a gas outlet port of thetank cover 3700 (also referred to as a humidification assembly gasoutlet port). In some embodiments, the connecting plate 3720 may be setas inclined outside the cover shell 3710.

FIG. 38 illustrates an exemplary cover shell according to someembodiments of the present disclosure. In some embodiments, as shown inFIG. 38, the cover shell 3710 may include a first aperture 3711, asecond aperture 3712, a connecting frame 3713, a barrier 3714, one ormore first clasps 3715, and one or more second clasps 3716. The firstaperture 3711 and the first aperture 3721 of the connecting plate 3720may function as the gas inlet port of the tank cover 3700. The secondaperture 3712 and the second aperture 3722 of the connecting plate 3720may function as the gas outlet port of the tank cover 3700. Theconnecting plate 3720 may be connected (e.g., fixed) to the connectingframe 3713. In some embodiments, the connecting plate 3720 may beconnected to the connecting frame 3713 by cementing, riveting, joggling,clamping, meshing, or the like, or any combination thereof. The barrier3714 may be configured to separate the gas inlet port and the gas outletport of the tank cover 3700 between the cover shell 3710 and theconnecting plate 3720, so that the respiratory gas flowing into the tankcover 3700 may be isolated from the respiratory gas flowing out of thetank cover 3700.

In some embodiments, a sealing strip (not shown) may be used to improvethe air tightness of the connection between the connecting frame 3713and the connecting plate 3720. For example, all joints between theconnecting frame 3713 and the connecting plate 3720 may be equipped withthe sealing strip. In some embodiments, a sealing strip (not shown) maybe set at the joint between the barrier 3714 and the connecting plate3720. In some embodiments, as shown in FIG. 37A, a first groove 37215and/or a second groove 37225 may be set between the cover shell 3710 andthe connecting plate 3720. The first groove 37215 and/or the secondgroove 37225 may be configured to accommodate a portion of the liquid(s)leaking from a tank (e.g., the tank 3300 shown in FIGS. 36A and 36B) andprevent the liquid(s) from entering the main body of the respiratoryventilation apparatus 110. For example, if the liquid chamber (e.g., theliquid chamber 3600 shown in FIGS. 36A and 36B) is tilted or placedobliquely, a portion of the liquids loaded in the tank 3300 may flowinto the tank cover 3700, and the first groove 37215 and/or the secondgroove 37225 may accommodate the portion of the liquids and prevent theportion of the liquids from entering the main body of the respiratoryventilation apparatus 110.

In some embodiments, the bottom plate 3750 may be fixed to the innershell 3730 by cementing, riveting, joggling, clamping, meshing, or thelike, or any combination thereof. In some embodiments, the bottom plate3750 and the inner shell 3730 may be configured as an integral piece. Insome embodiments, the first clasp(s) 3715 may be configured to fix theinner shell 3730 and the bottom plate 3750 to the cover shell 3710. Forexample, through the first clasp 3715, the inner shell 3730 and thebottom plate 3750 may be clamped to the cover shell 3710. In someembodiments, the first clasp 3715 may be set at the middle of an innerside wall of the cover shell 3710 opposite to the connecting frame 3713.In some embodiments, the second clasp 3716 may be configured to fix thefixing frame 3760 to the cover shell 3710. In some embodiments, several(e.g., 4, 6, 8, etc.) second clasps 3716 may be set at the inner sidewall(s) of the cover shell 3710 to fix the fixing frame 3760 to thecover shell 3710. For example, as shown in FIG. 38, each of the two sidewalls of the cover shell 3710 adjacent to the connecting frame 3713 mayinclude three second clasps 3716. In some embodiments, the tank coversealing frame 3770 may be fixed to the fixing frame 3760. In someembodiments, the fixing frame 3760 and the tank cover sealing frame 3770may be connected by cementing, clamping, meshing, or the like, or anycombination thereof. The tank cover sealing frame 3770 may be configuredto improve the air tightness of the connection between the tank (e.g.the tank 3300 shown in FIGS. 36A and 36B) and the tank cover 3700. Insome embodiments, the tank cover sealing frame 3770 may be made of asealing material including for example, silicone, rubber, nylon, or thelike, or any combination thereof. In some embodiments, some or all ofthe components of the cover shell 3710 (e.g., the first aperture 3711,the second aperture 3712, the connecting frame 3713, the barrier 3714,the first clasp 3715 and/or the second clasp 3716) may be configured asan integral piece.

In some embodiments, the cover shell 3710 may be connected and/orconnectable to the tank and/or the tank cover 3700. In some embodiments,the cover shell 3710 may be arranged pivotally relative to the tank. Insome embodiments, a liquid contacting side wall of the liquid chambermay be at least partially formed by an outer side wall of the tankforming the outer surface of the humidification assembly 220. In someembodiments, the tank may be formed with only one opening for fillingliquid(s) and/or for exchange of pressurized respiratory gas. In someembodiments, the tank cover 3700 may be pivotally connected to the tankthrough a connection mechanism. In some embodiments, at least a portionof the side of the first gas passage near the connection mechanism maybe covered in the flow direction by a side edge of the humidificationassembly gas inlet port of the liquid chamber. In some embodiments, atleast a portion of the side of the second gas passage near theconnection mechanism may be covered in the flow direction by a side edgeof the humidification assembly gas outlet port of the liquid chamber. Insome embodiments, the distance between the connection mechanism and thehumidification assembly gas outlet port may be less than the distancebetween the connection mechanism and the humidification assembly gasinlet port.

FIGS. 39A and 39B illustrate an exemplary inner shell of a tank coveraccording to some embodiments of the present disclosure. In someembodiments, as shown in FIGS. 39A and 39B, the inner shell 3730 mayinclude a gas inlet port 3731 and/or a gas outlet port 3732. In someembodiments, the gas inlet port 3731 may be configured to introduce agas (e.g., the pressurized respiratory gas), via a first gas passage(e.g., a gas passage as indicated by the arrows shown in FIG. 39A), intothe liquid chamber. As shown in FIG. 39A, the first gas passage (alsoreferred to as the gas inlet passage) may include an output port 3733.In some embodiments, the output port 3733 of the first gas passage maybe configured for connecting the first gas passage with the tank. Thegas may come out of the first gas passage through the output port 3733and enter into the liquid chamber. In some embodiments, the inner shell3730 may include a guide plate 3734. In some embodiments, the guideplate 3734 may be set on an edge of the output port 3733 of the firstgas passage. In some embodiments, the guide plate 3734 may be set on anupper edge and/or a side edge (e.g., the side edge closer to the gasinlet port 3731 and/or the gas outlet port 3732 of the inner shell 3730)of the output port 3733 of the first gas passage. In some embodiments,the guide plate 3734 may be configured to guide the gas to flow downwardto the tank below the tank cover 3700. Therefore, the guide plate 3734may reduce the amount of gas flowing into other spaces (e.g., the spacebetween the cover shell 3710 and the inner shell 3730). In someembodiments, the gas passage sealing frame 3740 may be connected to theinner shell 3730, ensuring air tightness between the inner shell 3730and the cover shell 3710. In some embodiments, the gas passage sealingframe 3740 may be fixed to the inner shell 3730 by cementing, riveting,joggling, clamping, meshing, or the like, or any combination thereof.

In some embodiments, the gas inlet port 3731 (also referred to as thehumidification assembly gas inlet port) and the output port 3733 of thefirst gas passage may be set on different side surfaces of the innershell 3730. For example, as shown in FIG. 39A, the gas inlet port 3731may be set on a right portion of a first side surface of the inner shell3730, and the output port 3733 of the first gas passage may be set on aleft portion of a second side surface of the inner shell 3730, whereinthe second side surface of the inner shell 3730 may be adjacent to thefirst side surface of the inner shell 3730 in a clockwise direction. Thegas inlet port 3731 and the output port 3733 of the first gas passagemay be set as shown in FIG. 39A, such that the liquid(s) (e.g., water)in the tank may be difficult to enter the main body of the respiratoryventilation apparatus 110, regardless of how the respiratory ventilationapparatus 110 is placed or moved. In some embodiments, the distancebetween the output port 3733 of the first gas passage and thehumidification assembly gas inlet port may be larger than the distancebetween the output port 3733 of the first gas passage and thehumidification assembly gas outlet port. In some embodiments, the firstside surface of the cover shell 3710 of the liquid chamber may face thefirst side wall of the housing of the main body of the respiratoryventilation apparatus 110.

In some embodiments, the gas outlet port 3732 (also referred to as thehumidification assembly gas outlet port) may be configured to introducea gas (e.g., the humidified and pressurized respiratory gas), via asecond gas passage (e.g., a gas passage as indicated by the arrows shownin FIG. 39B) back into the main body of the respiratory ventilationapparatus 110. As shown in FIG. 39B, the second gas passage (alsoreferred to as the gas outlet passage) may include an input port 3735.In some embodiments, the input port 3735 of the second gas passage maybe configured for connecting the second gas passage with the tank. Thegas may flow into the second gas passage through the input port 3735from the liquid chamber. In some embodiments, the first gas passageand/or the second gas passage may have a substantially rectangularcross-section. In some embodiments, the first gas passage and the secondgas passage may cross each other.

In some embodiments, the gas outlet port 3732 (also referred to as thehumidification assembly gas outlet port) and the input port 3735 of thesecond gas passage may be set on different side surfaces of the innershell 3730. For example, as shown in FIG. 39B, the gas outlet port 3732may be set on a left portion of the first side surface of the innershell 3730, and the input port 3735 of the second gas passage may be seton a right portion of a third side surface of the inner shell 3730,wherein the third side surface of the inner shell 3730 may be adjacentto the first side surface of the inner shell 3730 in an anti-clockwisedirection. The gas outlet port 3732 and the input port 3735 of thesecond gas passage may be set as shown in FIG. 39B, such that theliquid(s) (e.g., water) in the tank may be difficult to enter the mainbody of the respiratory ventilation apparatus 110, regardless of how therespiratory ventilation apparatus 110 is placed or moved. In someembodiments, the first gas passage and the second gas passage may be setas non-parallel (such as crossed) in the liquid chamber, thereby makingthe output port 3733 of the first gas passage and the input port 3735 ofthe second gas passage opening in different directions. In someembodiments, the distance between the input port 3735 of the second gaspassage and the humidification assembly gas outlet port may be largerthan the distance between the input port 3735 of the second gas passageand the humidification assembly gas inlet port.

In some embodiments, the gas inlet port and/or the gas outlet port ofthe tank cover 3700 (i.e., the humidification assembly gas inlet port ofthe liquid chamber and/or the humidification assembly gas outlet port ofthe liquid chamber) may be set on a first side surface of the covershell 3710 (corresponding to the first side surface of the inner shell3730) of the liquid chamber. In some embodiments, the output port 3733of the first gas passage and the input port 3735 of the second gaspassage may be set on opposite side surfaces of the inner shell 3730.For example, the output port 3733 of the first gas passage may be set onthe second side surface of the inner shell 3730, while the input port3735 of the second gas passage may be set on the third side surface ofthe inner shell 3730. That is, the output port 3733 of the first gaspassage may face a second side surface of the cover shell 3710corresponding to the second side surface of the inner shell 3730, whilethe input port 3735 of the second gas passage may face a third sidesurface of the cover shell 3710 corresponding to the third side surfaceof the inner shell 3730.

In some embodiments, as shown in FIG. 39B, a portion or all portions ofthe bottom plate 3750 may be set below a lower edge of the gas inletport 37311 and/or a lower edge of the gas outlet port 37321 of the tankcover 3700. Therefore, the bottom plate 3750 may be capable ofaccommodating a portion of the liquid(s) in the tank, and the heightdifference between the bottom plate 3750 and the lower edge of the gasinlet port 37311 and/or the lower edge of the gas outlet port 37321 mayprevent the liquid(s) in the tank from entering the main body of therespiratory ventilation apparatus 110. In some embodiments, the innershell 3730 may include one or more third clasps 3736. The third clasps3736 may be configured to connect the gas passage sealing frame 3740with the inner shell 3730. As shown in FIG. 39B, the inner shell 3730may include three clasps 3736 that may be equally spaced on the bottomedge of the first side surface of the inner shell 3730.

FIG. 40 illustrate an exemplary bottom plate of an inner shell of a tankcover according to some embodiments of the present disclosure. As shownin FIG. 40, the bottom plate 3750 may include one or more sealing strips3752 set along the edge(s) of the bottom plate 3750. The sealingstrip(s) 3752 may be configured to improve the air tightness of theconnection between the bottom plate 3750 and the inner shell 3730. Insome embodiments, the bottom plate 3750 may include a bottom of thesecond gas passage (e.g., the second inclined plate 3751) and a bottomof the first gas passage (e.g., the rest of the bottom plate 3750 exceptfor the second inclined plate 3751).

FIGS. 41A and 41B illustrate an exemplary inner structure of an innershell of a tank cover according to some embodiments of the presentdisclosure. FIG. 41A shows the gas inlet passage of the tank cover 3700.FIG. 41A shows an upward view of the tank cover 3710 without the bottomplate 3750. FIG. 41B shows the gas outlet passage of the tank cover3700. FIG. 41B shows a sectional view of the tank cover 3700. In someembodiments, the gas inlet passage (i.e., the first gas passage asindicated by the arrows shown in FIG. 41A) may include a first portionand a second portion. The first portion of the first gas passage mayextend from the gas inlet port (e.g., the first aperture 3721) of thetank cover 3700 to a common plane (e.g., the common plane 3737 indicatedby the parallelogram with dotted lines in FIGS. 41A and 41B). The secondportion of the first gas passage may extend from the common plane 3737to the output port 3733 of the first gas passage. In some embodiments,the second gas passage may include a first portion and a second portion.The first portion of the second gas passage may extend from the inputport of the second gas passage 3735 to the common plane 3737. The secondportion of the second gas passage may extend from the common plane 3737to the gas outlet port (e.g., the second aperture 3722) of the tankcover 3700.

In some embodiments, the first portion of the first gas passage may besubstantially parallel to the second portion of the second gas passagealong a direction having an angle with (e.g., substantiallyperpendicular to) the first side surface (e.g., the side surfaceincluding the connecting frame 3713 as shown in FIG. 38) of the covershell 3710 of the tank cover 3700. In some embodiments, the secondportion of the first gas passage and the first portion of the second gaspassage may be set in different layers. In some embodiments, a firstprojection of the second portion of the first gas passage on ahorizontal plane and a second projection of the first portion of thesecond gas passage on the horizontal plane may be intersecting or atleast partially overlapping. In some embodiments, as shown in FIGS. 41Aand 41B, the second portion of the first gas passage may be set belowthe first portion of the second gas passage. In some embodiments, thefirst portion of the second gas passage may be set below the secondportion of the first gas passage. In some embodiments, an area of afirst cross section of the first gas passage on the common plane may beequal to or less than a portion (e.g., a half) of an area of the gasinlet port (e.g., the first aperture 3721) of the tank cover 3700. Insome embodiments, an area of a second cross section of the second gaspassage on the common plane may be equal to or less than a portion(e.g., a half) of an area of the gas outlet port (e.g., the secondaperture 3722) of the tank cover 3700.

In some embodiments, a first inclined plate 3739 (see FIGS. 39B and 41B)may be set between the first cross section and the gas inlet port (e.g.,the first aperture 3721) of the tank cover 3700. The first inclinedplate 3739 may be configured to smooth the flowing of the pressurizedrespiratory gas in the first gas passage. In some embodiments, the firstinclined plate 3739 (see FIGS. 39B and 41B) may be set as a part of theinner shell 3730. In some embodiments, a second inclined plate 3751 maybe set between the second cross section and the gas outlet port (e.g.,the second aperture 3722) of the tank cover 3700. The second inclinedplate 3751 may be configured to smooth the flowing of the humidified andpressurized respiratory gas in the second gas passage. In someembodiments, the second inclined plate 3751 (see FIGS. 40 and 41B) maybe set on the bottom of the tank cover 3700. For example, the secondinclined plate 3751 may be a part of the bottom plate 3750.

It should be noted that the above description of the tank cover 3700 ismerely provided for the purposes of illustration and not intended tolimit the scope of the present disclosure. For persons having ordinaryskill in the art, multiple variations and modifications may be madeunder the teachings of the present disclosure. However, those variationsand modifications do not depart from the scope of the presentdisclosure. For example, as shown in FIGS. 42A and 42B, the inner shell4230 of the tank cover 4200 may not include the first inclined plate. Asanother example, the tank cover 4200 may not include the second inclinedplate. As a further example, the bottom of the tank cover 4200 may alignto a lower edge of the gas inlet port 4221 and/or a lower edge of thegas outlet port 4222 in the horizontal plane. FIGS. 42A and 42Billustrate another exemplary tank cover according to some embodiments ofthe present disclosure.

FIGS. 43A-43C illustrate exemplary electronic components in a main bodyof a respiratory ventilation apparatus according to some embodiments ofthe present disclosure. In some embodiments, as shown in FIG. 43A, theelectronic components 4300 in the main body may include one or moreprinted circuit board (PCB) 4320, an on-off button 4310, a wirelessmodule assembly 4330, a rotary knob 4350, a secure digital (SD) cardread-write storage module 4340, a panel 4360, a home button 4370, and adisplayer 4380. In some embodiments, the printed circuit board (PCB)4320 may include one or more processors (e.g., ARM, PLD, MCU, DSP, FPGA,SoC), one or more controllers, one or more resistors, one or morecapacitors, one or more inductors, one or more crystal oscillators, oneor more ceramic filters, one or more mechanical switches, one or moreconnectors, one or more diodes, one or more transistors, one or morethyristors, one or more integrated circuits, one or more sensors (e.g.,a flow sensor, a pressure sensor, a humidity sensor, a temperaturesensor, etc.). In some embodiments, the one or more processors (and/orthe one or more controllers) may be coupled with one or more electroniccomponents 4300 of the printed circuit board (PCB) 4320, the on-offbutton 4310, the wireless module assembly 4330, the rotary knob 4350,the home button 4370, and the displayer 4380 to control the operation ofthe respiratory ventilation apparatus 110. For example, if a user (e.g.,the subject 180) presses the on-off button 4310, the processor(s) may betriggered to control the start or stop of the respiratory ventilationapparatus 110. In some embodiments, the gas pressurization unit 210 maybe coupled with (or electrically connected with) the electroniccomponents 4300. In some embodiments, the electronic components 4300 mayinclude the gas pressurization unit 210.

In some embodiments, a first hole 4361 may be set on the panel 4360, andthe rotary knob 4350 may be connected to (or coupled with) the printedcircuit board (PCB) 4320 through the first hole 4361. In someembodiments, if the rotary knob 4350 is turned, the controller(s) maycontrol the operation of one or more of the electronic components 4300.In some embodiments, the rotary knob 4350 may be configured to adjustthe brightness of the displayer 4380. For example, if the rotary knob4350 is turned gradually toward a certain direction (clockwise oranti-clockwise), the brightness of the displayer 4380 may become larger,and accordingly, if the rotary knob 4350 is turned in the oppositedirection, the brightness of the displayer 4380 may become smaller. Insome other embodiments, the rotary knob 4350 may be configured to adjustthe gas flow. For example, if the rotary knob 4350 is turned graduallytoward a certain direction (clockwise or anti-clockwise), the gas flowmay become larger, and accordingly, if the rotary knob 4350 is turned inthe opposite direction, the gas flow may become smaller. In someembodiments, the rotary knob 4350 may be used as an on-off button. Insome embodiments, the rotary knob 4350 may be configured to adjust thepressure of the respiratory gas flowing in the gas passage(s) of therespiratory ventilation apparatus 110. For example, if the rotary knob4350 is turned gradually toward a certain direction (clockwise oranti-clockwise), the pressure of the respiratory gas may become larger,and accordingly, if the rotary knob 4350 is turned in the oppositedirection, the pressure of the respiratory gas may become smaller.

In some embodiments, the panel 4360 may be configured to protect thedisplayer 4380 from damage and/or make the overall appearance of therespiratory ventilation apparatus 110 more elegant. In some embodiments,the panel 4360 may be transparent. In some embodiments, the informationdisplayed on the displayer 4380 may be observed through the panel 4360.The information displayed on the displayer 4380 may include a userinterface, one or more working parameters generated or detected duringthe operation of the respiratory ventilation apparatus 110, vital signinformation of the user (e.g., the subject 180), etc. In someembodiments, the working parameters may include the pressure of therespiratory gas, the temperature of the respiratory gas, the humidity ofthe respiratory gas, a working mode of the respiratory ventilationapparatus 110, a status of the peripheral device, a working time, etc.In some embodiments, the vital sign information may include arespiratory frequency of the user, a snoring of the user, a sleepingstatus of the user, a tidal volume of the user, etc. In some otherembodiments, a light sensor that is configured to detect an intensity ofambient light may be set outside of the respiratory ventilationapparatus 110 and coupled with the electronic components 4300, so thatthe processor(s) (and/or controller(s)) may control the brightness ofthe displayer 4380 automatically based on the intensity of the ambientlight. In some embodiments, the displayer 4380 may include a liquidcrystal display (LCD) screen, a light-emitting diode (LED) screen, orthe like.

In some embodiments, the home button 4370 may be configured to reset theworking parameter(s) to original or initial value(s). In someembodiments, the home button 4370 may be configured to control theinterface to return to a home page or a previous page. In someembodiments, a second hole 4362 may be set on the panel 4360, and thehome button 4370 may be connected to (or coupled with) the printedcircuit board (PCB) 4320 through the second hole 4362.

In some embodiments, the wireless module assembly 4330 may be configuredto control the respiratory ventilation apparatus 110. In someembodiments, the wireless module assembly 4330 may include a Bluetoothmodule, a ZigBee module, a mobile communication module, a radiofrequency (RF) communication module, a WiFi module, or the like, or acombination thereof. In some embodiments, the respiratory ventilationapparatus 110 may connect to the internet through the WiFi module. Insome embodiments, the working parameter(s) of the respiratoryventilation apparatus 110 may be adjusted (or controlled, or changed) bya remote computer (e.g., a mobile terminal). In some embodiments, theradio frequency (RF) communication module may be coupled with a remotecontroller, and a user (e.g., the subject 180) may start, stop, adjust,and/or control the operation of the respiratory ventilation apparatus110 via the remote controller remotely. In some embodiments, thewireless module assembly 4330 may be coupled with one or more sensorsequipped in the respiratory ventilation apparatus 110 to obtaininformation detected by the sensor(s). For example, the wireless moduleassembly 4330 may be coupled with a flow sensor located in the gaspassage(s) of the respiratory ventilation apparatus 110 to obtain theflux of the respiratory gas.

In some embodiments, the secure digital (SD) card read-write storagemodule 4340 may be configured to accommodate a secure digital (SD) card,read information from the SD card, and/or write information to the SDcard. It should be noted that the secure digital (SD) card may bedispensable. In some embodiments, the secure digital (SD) card may beconfigured to store the user's vital sign information, the workingparameters generated or detected during the operation of the respiratoryventilation apparatus 110, and/or one or more preset working parameters.In some embodiments, the memory size of the secure digital (SD) card maybe selected by the user.

FIGS. 44A and 44B illustrate an exemplary heating device according tosome embodiments of the present disclosure. As shown in FIG. 44A, aheating device 4414 may be set on the baseplate 4410 of a main body of arespiratory ventilation apparatus 110. In some embodiments, at least aportion of the baseplate 4410 may be set underneath a liquid chamber(e.g., the liquid chamber 320). The heating device 4414 may beconfigured to heat the liquid(s) in the liquid chamber and/or acceleratethe evaporation of the liquid(s) in the liquid chamber. In someembodiments, as shown in FIG. 44B, the heating device 4414 may include abracket 4440, a heater plate 4420 and a fixing frame 4430. The fixingframe 4430 may be configured to fix the heater plate 4420 to the bracket4440. In some embodiments, the heater plate 4420 may be fixed to thebracket 4440 by one or more screws (or snaps) or any other fixingmechanism. The heater plate 4420 may include for example, a stainlesssteel electric heater plate (mica electric heater plate), a ceramicelectric heater plate, a cast aluminum electric heater plate, a castcopper electric heater plate, or the like, or a combination thereof. Insome embodiments, one or more springs 4460 may be set underneath thebracket 4440, so that the heating device 4414 may be capable of movingup and down if a pressure is imposed on or removed from the heater plate4420. More descriptions of the connection between the heating device4414 and the baseplate 4410 may be found elsewhere in the presentdisclosure (e.g., FIGS. 22A-22D and the descriptions thereof).

FIG. 45 illustrate an exemplary liquid chamber according to someembodiments of the present disclosure. In some embodiments, the liquidchamber 4500 may include a tank 4530. The tank 4530 may be configured toaccommodate one or more liquids. In some embodiments, the tank 4530 mayinclude a heat conducting plate 4510. The heat conducting plate 4510 maybe configured to conduct the heat generated by the heater plate 4420 tothe liquid(s) in the tank 4530, so that the liquid(s) may evaporate togenerate vapor to humidify the respiratory gas. In some embodiments, theheat conducting plate 4510 may be made of a heat conducting materialincluding for example, one or more metals with capability of heatconductivity (e.g., copper, aluminum), heat conducting silica gel, orthe like, or a combination thereof. In some embodiments, one or moreheat conducting coatings, such as heat conducting silica gel, may bedisposed on the surface of the heat conducting plate 4510 to promotethermal contact between the heater plate 4420 and the heat conductingplate 4510.

In some embodiments, the heat conducting plate 4510 may be fixed to thebottom of the tank 4530 by screw(s) or glue. In some embodiments, thebottom of the tank 4530 may include a groove 4520. In some embodiments,the shape of the groove 4520 may fit with the shape the heater plate4420, so that if the tank 4530 is mounted on the baseplate 4410, theheating device 4414 may be totally or partly trapped in the groove 4520.Therefore, the heater plate 4420 and the heat conducting plate 4510 canbe closely connected.

In order to reduce heat loss, it may be necessary to ensure that theheater plate 4420 and the heat conducting plate 4510 are in closecontact with each other. As illustrated in FIG. 44B, one or more springs4460 may be set below the heater plate 4420. If the tank 4530 is mountedabove the heating device 4414, the spring(s) 4460 may be compressed, andthe compressed spring(s) 4460 may push the heater plate 4420 to the heatconducting plate 4510, increasing the contact pressure between theheater plate 4420 and the heat conducting plate 4510 and ensuring theclose contact therebetween. In some embodiments, a plurality of elasticcolumns may be used instead of the spring(s) 4460.

In some other embodiments, one or more heating rods, one or moreelectrodes or one or more ultrasonic atomizers may be directly installedin the tank 4530 to heat the liquid(s) in the tank 4530. In someembodiments, the heating device 4414 may be coupled to (or electricallyconnected with) the electronic components 4300. The controller(s) maycontrol the start, stop, suspend, resume of the heating of the heatingdevice 4414, the heating rate of the heating device 4414, the heatingpower of the heating device 4414, etc., so as to control the humidity ofthe respiratory gas.

Having thus described the basic concepts, it may be rather apparent tothose skilled in the art after reading this detailed disclosure that theforegoing detailed disclosure is intended to be presented by way ofexample only and is not limiting. Various alterations, improvements, andmodifications may occur and are intended to those skilled in the art,though not expressly stated herein. These alterations, improvements, andmodifications are intended to be suggested by this disclosure and arewithin the spirit and scope of the exemplary embodiments of thisdisclosure.

Moreover, certain terminology has been used to describe embodiments ofthe present disclosure. For example, the terms “one embodiment,” “anembodiment,” and/or “some embodiments” mean that a particular feature,structure or characteristic described in connection with the embodimentis included in at least one embodiment of the present disclosure.Therefore, it is emphasized and should be appreciated that two or morereferences to “an embodiment” or “one embodiment” or “an alternativeembodiment” in various portions of this specification are notnecessarily all referring to the same embodiment. Furthermore, theparticular features, structures or characteristics may be combined assuitable in one or more embodiments of the present disclosure.

Further, it will be appreciated by one skilled in the art, aspects ofthe present disclosure may be illustrated and described herein in any ofa number of patentable classes or context including any new and usefulprocess, machine, manufacture, or composition of matter, or any new anduseful improvement thereof. Accordingly, aspects of the presentdisclosure may be implemented entirely hardware, entirely software(including firmware, resident software, micro-code, etc.) or combiningsoftware and hardware implementation that may all generally be referredto herein as a “unit,” “module,” or “system.” Furthermore, aspects ofthe present disclosure may take the form of a computer program productembodied in one or more computer-readable media having computer readableprogram code embodied thereon.

Similarly, it should be appreciated that in the foregoing description ofembodiments of the present disclosure, various features are sometimesgrouped together in a single embodiment, figure, or description thereoffor the purpose of streamlining the disclosure aiding in theunderstanding of one or more of the various inventive embodiments. Thismethod of disclosure, however, is not to be interpreted as reflecting anintention that the claimed subject matter requires more features thanare expressly recited in each claim. Rather, inventive embodiments liein less than all features of a single foregoing disclosed embodiment.

In some embodiments, the numbers expressing quantities or propertiesused to describe and claim certain embodiments of the application are tobe understood as being modified in some instances by the term “about,”“approximate,” or “substantially.” For example, “about,” “approximate,”or “substantially” may indicate ±20% variation of the value itdescribes, unless otherwise stated. Accordingly, in some embodiments,the numerical parameters set forth in the written description andattached claims are approximations that may vary depending upon thedesired properties sought to be obtained by a particular embodiment. Insome embodiments, the numerical parameters should be construed in lightof the number of reported significant digits and by applying ordinaryrounding techniques. Notwithstanding that the numerical ranges andparameters setting forth the broad scope of some embodiments of theapplication are approximations, the numerical values set forth in thespecific examples are reported as precisely as practicable.

Each of the patents, patent applications, publications of patentapplications, and other material, such as articles, books,specifications, publications, documents, things, and/or the like,referenced herein is hereby incorporated herein by this reference in itsentirety for all purposes, excepting any prosecution file historyassociated with same, any of same that is inconsistent with or inconflict with the present document, or any of same that may have alimiting affect as to the broadest scope of the claims now or laterassociated with the present document. By way of example, should there beany inconsistency or conflict between the description, definition,and/or the use of a term associated with any of the incorporatedmaterial and that associated with the present document, the description,definition, and/or the use of the term in the present document shallprevail.

In closing, it is to be understood that the embodiments of theapplication disclosed herein are illustrative of the principles of theembodiments of the application. Other modifications that may be employedmay be within the scope of the application. Thus, by way of example, butnot of limitation, alternative configurations of the embodiments of theapplication may be utilized in accordance with the teachings herein.Accordingly, embodiments of the present application are not limited tothat precisely as shown and described.

1-67. (canceled)
 68. A respiratory ventilation apparatus configured todeliver a respiratory gas to a patient interface, comprising: a gaspressurization unit located in a main body of the respiratoryventilation apparatus, and being configured to generate a pressurizedrespiratory gas by pressurizing the respiratory gas; a humidificationassembly being removably coupled to the main body of the respiratoryventilation apparatus, and being configured to humidify the pressurizedrespiratory gas, the main body of the respiratory ventilation apparatusincluding a housing provided with a first side wall configured todischarge the pressurized respiratory gas; wherein the humidificationassembly includes: a liquid chamber configured to accommodate one ormore liquids; and the respiratory ventilation apparatus furthercomprising: a first gas inlet port configured to introduce therespiratory gas into the respiratory ventilation apparatus, the firstgas inlet port being set on a second side wall of the housing of themain body of the respiratory ventilation apparatus; and a first gasoutlet port configured to discharge the humidified and pressurizedrespiratory gas to a respiration tube; wherein the liquid chamber beingopenable from a front surface of the respiratory ventilation apparatus;wherein the humidification assembly further includes a heater plateconfigured to heat the one or more liquids and generate vapor tohumidify the pressurized respiratory gas. 69-77. (canceled)
 78. Therespiratory ventilation apparatus of claim 68, wherein the liquidchamber is in detachable connection with the main body of therespiratory ventilation apparatus.
 79. The respiratory ventilationapparatus of claim 68, wherein the liquid chamber comprises: a tank; anda tank cover pivotally connected to the tank through a connectionmechanism.
 80. The respiratory ventilation apparatus of claim 79,wherein the tank cover includes a second gas inlet port, the second gasinlet port being configured to introduce the pressurized respiratory gasfrom the main body of the respiratory ventilation apparatus into theliquid chamber.
 81. The respiratory ventilation apparatus of claim 68,wherein the first gas outlet port is set on the liquid chamber.
 82. Therespiratory ventilation apparatus of claim 80, further comprising: aconnecting piece configured to provide a sealed connection between thetank cover and the main body of the respiratory ventilation apparatus,the connecting piece including a declining surface facing the tankcover, wherein the tank cover includes a corresponding declining surfacefacing the connecting piece, and the declining surface of the tank coverincludes the second gas inlet port.
 83. The respiratory ventilationapparatus of claim 82, wherein the connecting piece includes a gasket,the gasket includes a first aperture, the first aperture corresponds tothe second gas inlet port of the tank cover, so that when the tank coveris closed, the tank cover is in sealed connection with the main body ofthe respiratory ventilation apparatus through the gasket, and the firstaperture and the gas inlet port of the tank cover are capable ofintroducing the pressurized respiratory gas from the main body of therespiratory ventilation apparatus into the liquid chamber.
 84. Therespiratory ventilation apparatus of claim 80, further comprising: aconnecting piece configured to provide a sealed connection between thetank cover and the main body of the respiratory ventilation apparatus,the connecting piece including a first thread hose, the first threadhose corresponding to the second gas inlet port of the tank cover. 85.The respiratory ventilation apparatus of claim 79, wherein the tankcover includes a second gas inlet port and a second gas outlet port, thesecond gas inlet port being configured to introduce the pressurizedrespiratory gas from the main body of the respiratory ventilationapparatus into the liquid chamber, the second gas outlet port beingconfigured to discharge the humidified and pressurized respiratory gasfrom the liquid chamber back into the main body of the respiratoryventilation apparatus.
 86. The respiratory ventilation apparatus ofclaim 85, further comprising: a connecting piece configured to provide asealed connection between the tank cover and the main body of therespiratory ventilation apparatus.
 87. The respiratory ventilationapparatus of claim 86, wherein the connecting piece includes a decliningsurface facing the tank cover, the tank cover includes a correspondingdeclining surface facing the connecting piece, and the declining surfaceof the tank cover includes the second gas inlet port and the second gasoutlet port.
 88. The respiratory ventilation apparatus of claim 87,wherein an angle between the declining surface of the connecting pieceand a horizontal plane is substantially within 45°-60°.
 89. Therespiratory ventilation apparatus of claim 87, wherein the connectingpiece includes a gasket, the gasket includes a first aperture and asecond aperture, the first aperture corresponds to the second gas inletport of the tank cover, the second aperture corresponds to the secondgas outlet port of the tank cover, so that when the tank cover isclosed, the tank cover is in sealed connection with the main body of therespiratory ventilation apparatus through the gasket, the first apertureand the second gas inlet port of the tank cover are capable ofintroducing the pressurized respiratory gas from the main body of therespiratory ventilation apparatus into the liquid chamber, and thesecond aperture and the second gas outlet port of the tank cover arecapable of introducing the humidified and pressurized respiratory gasfrom the liquid chamber back into the main body of the respiratoryventilation apparatus.
 90. The respiratory ventilation apparatus ofclaim 86, wherein the connecting piece includes a first thread hose anda second thread hose, the first thread hose corresponds to the secondgas inlet port of the tank cover, the second thread hose corresponds tothe second gas outlet port of the tank cover.
 91. The respiratoryventilation apparatus of claim 90, wherein the first thread hose and thesecond thread hose are substantially vertical, and the second gas inletport and the second gas outlet port of the tank cover are set in ahorizontal surface facing the first thread hose and the second threadhose, so that when the tank cover is closed, the tank cover is in sealedconnection with the main body of the respiratory ventilation apparatusthrough the first thread hose and the second thread hose, the firstthread hose and the second gas inlet port of the tank cover are capableof introducing the pressurized respiratory gas from the main body of therespiratory ventilation apparatus into the liquid chamber, and thesecond thread hose and the second gas outlet port of the tank cover arecapable of introducing the humidified and pressurized respiratory gasfrom the liquid chamber back into the main body of the respiratoryventilation apparatus. 92-196. (canceled)